10-26 Exercise 3: Find roots of a quadratic equation

0 like 1 dislike
18.6k views

Write a program to find roots of a quadratic equation

A quadratic equation is a second order equation having a single variable. Any quadratic equation can be represented as where a, b and c are constants ( a can't be 0) and x is unknown variable. 

寫一個找二次方程的求根程式

For Example

 is a quadratic equation where a, b and c are 2, 5 and 3 respectively.

To calculate the roots of quadratic equation we can use below formula. There are two solutions of a quadratic equation.

使用下列公式:

x = (-b + sqrt(D))/(2*a)
x = (-b - sqrt(D))/(2*a)

where, D = (b*b-4*a*c) is Discriminant (判別式), which differentiate the nature of the roots of quadratic equation.

For the complex result (複數根):

realPart = -b/(2*a);
imaginaryPart =sqrt(-D)/(2*a);

Note: We have used sqrt() function to find square root which is in math.h library.

 

Example input 1:

1 2 1

Example output 1:

Roots of 1.00x^2 + 2.00x + 1.00 = 0 are real and same
x1 = x2 = -1.00

 

Example input 2:

1 -3 2

Example output 2:

Roots of 1.00x^2 + -3.00x + 2.00 = 0 are real and different
x1 = 2.00
x2 = 1.00

 

Example input 3:

1 2 2

Example output 3:

Roots of 1.00x^2 + 2.00x + 2.00 = 0 are complex and different
x1 = -1.00+1.00i
x2 = -1.00-1.00i
[Exercise] Coding (C) - asked in Chapter 5: Selection Statements by (5.2k points)
ID: 28934 - Available when: 2017-10-26 18:00 - Due to: Unlimited
reopened by | 18.6k views
0 0
We will continue this question in few days
commented by (12.1k points)
0 0
Everything is fixed. Enjoy your time with The Judge :)
commented by (12.1k points)
0 0
ANNNNNNNNNNNNNNNNNNNNNNNNNNGRYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
commented by (-249 points)
0 0
Your code has newline at the end sometime. You learned this lesson many times!
commented by (12.1k points)
0 0
After i correct the newline in my code,there is still wrong output.However,I had run the program in Codeblocks.The output is still as well as the result. Seeking for help.
commented by (-214 points)
0 0
your output lack of 1 space at line 8 when print out "Roots of ...". Please be careful with all small details when working with online judge
commented by (9.9k points)

56 Answers

0 like 0 dislike 
Hidden content!
   * * **     ** ****
*  *  * * ***   **   
int main()
{
******  **  ** *****     ** **  **  a,b,c,D = 0,x1 = 0,x2 = 0,Real = 0,imaginary = 0;
*    ****  ** *  ****   **   *** *    ****** *  ** *  **** * * ** ********  *

   ***   *   *** *   * *  *         *   of %.2fx^2 + %.2fx +%.2f = 0 are",a,b,c);
* * ***  **  * *  * ***   = (b*b-4*a*c);
  *  * * *  * * ** ** **    = (-b + sqrt(D))/(2*a);
* ** **  **    * **** *    * = (-b - sqrt(D))/(2*a);
   *  ** ***   * * * *  ***  * * (D < 0)
* ********* ** ******  *  ****  *
 ** * *    ** ** * **  ***  * **   ****  complex and  *** * ***** *
** **   *  * * *** **  **  * **** **  = *  *    * *    *  * *   * ** **  **  
*   *****   ** ***** *    * * *   ****  = *** *** *  *   * ** * *  *******  
* *   ***   * ******* * * *** 
****   ** * *  *  ***   *** * (D > 0)
***    * *   ***** **   *   *
   **    **  * ***  ***   **      *  *   real and   *** * *  * **
 ** *** *** *** * * *****    * ** ** ***   =  *   ** * ** 
  * *   * *  *     ***** *   * *  *   **** = %.2f",x2);
 *      ***  * ****  **  *** 
  *    * *  * ****   **     (D == 0)
*  * **  *     * *   ** 
 * * * ****  ** *  ***  ** * * ******* real and same\r\n");
 *  *   *** * ****   **    * ** **  *** = x2 = %.2f",x1);
*    **    *      **        *
}
answered by (-214 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
**    ****** ** *  *
int main(void)
{
    *  **** *   * ******** **   a,b,c,D = 0,x1 = 0,x2 = 0,Real = 0,imaginary = 0;
 * *    *  *  ** * ****    * ** * **  *     ****   * *    *   * * 

* **  **   ****** *   *  **    ** ******  * of %.2fx^2 + %.2fx +%.2f = 0  *     *    *  
** *  * ****    *  *  **   **  = (b*b-4*a*c);
   **  ***  ****   *    * * = (-b + sqrt(D))/(2*a);
** *  *   *  *  ***   ** * *  = (-b - sqrt(D))/(2*a);
 *  *  *   ** *   *  *  *  * ** = -b/(2*a);
 ***  * ***   *  ***  ***  *   = sqrt(-D)/(2*a);
 * *   ** **   *  ****** *  (D < 0)
**** *   ****** **** ** **** ****
 *** *** * *** **** **     *            complex and  * **   ***  **
*  ** * ** *    * ***  **  **  **   ***  =  *  * *****   ****   ** * *    * 
* ****** *  **  * * **** ** *   * * =  ** * *** ** *     * *  *
* *** * * * ** *  **   ** * *
 *  *    *  **   * * *  **   (D > 0)
*    * *  ***** * ** * **   *
 ** * * *  *  *** **     ** *    * ** *** *   real and   * *  **   *  *** *
  *   * ** **     ** **      **    ** =        ******
 **   *  * ****  ***       * ***** * *** * *  = %.2f",x2);
    * *   * * * ** * *** *
** * * **  * * ** ***      * (D == 0)
**  **     * **   ** * *  *** *
   ***** ***  *** * ** ***  *** **   real and same\r\n");
*    *****    ****  ***    *    *** = x2 = %.2f",x1);
*    *  *   ***** * ** *
}
answered by (-214 points)
0 0
prog.c: In function 'main':
prog.c:9:16: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1 = (-b + sqrt(D))/(2*a);
                ^~~~
prog.c:9:16: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:9:16: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
 **** *  *** ****     
#  * *  **  * *** *  
int main()
{

  **   ** **  * *  **  **  ***** ** **** * *** * **  
*   * *  *  ***     * * *     *  * *  %f *   *   * * **   ** *  *  * * *
***    *** *   **  * * * ** = (b*b-4*a*c);
 *  ***  **  * **   * *** = (-b + sqrt(D))/(2*a);
   * *  **** * **   *  *  = (-b - sqrt(D))/(2*a);
  * ** ****       ******** ***** * 
* ** ***  **   *** * ** *
* * *  * *  * * * * * * *** *    ******  * ***   *** = -b/(2*a);
***  *    * *** ** **  *  * * **   **  ** * *** * *** *** * *  ** =sqrt(-D)/(2*a);
  **** *** ** **** * *** ********  ***  **  *        * **  *  * **   of %.2fx^2 + %.2fx + %.2f = 0 are complex and  * *******  * 
* ****  * * *** ******* *       * ** ***  *        * *  * *   **** = %.2f+%.2fi\n", realPart,imaginaryPart);
*  ** ***  ****   **  **  * * * *   **  * *   *  **   ********   = %.2f+%.2fi",  ***  * * *** * 
 *  **     *    *  *** *******
***** **     ****    **     if(D == 0)
 ***** ** ***  *** **    **   

** * ** ** *     * *  *   *  **  *   * * **  **  * * ****  *  *  * **   of %.2fx^2 + %.2fx + %.2f = 0 are real and  ** ****  *****    *
  *  *   ***    *  ** *     *** *   ***  *  **** *  ** **  = x2 = %.2f", x1);
*** **   * **** *   ********
  * *** ****   * * ***** * ** 
 *  *** * *   ** **   ** 
* *  *  ****  **** *  **  *   * ***  *     *** * *   ** * **   **  * ** of %.2fx^2 + %.2fx + %.2f = 0 are real and * *** ** *****  *  ** 
* * **  * * **     * *****   *  *   * * * *  **  * * ** *       ** * *  *  * = %.2f\n", x1);
 ** * * *  *    * * * **   ** * * *****  ***  *  ** * ***  = %.2f", x2);
  ***   *     **    *  * *  *
    * ** *  * *  *** *  ** * ** ** 0;

}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*  ******   **  ** * **
#   ** *** *   * ** 
int main()
{

   * *   * ** * ** *  ***  *    **  * **   * ** * ***    
**  **  *  *   *  *  **  * *  * **  ** *  ** %f   * ** *** ***  * *  ** * * *
 **      ** * ** *   * *   = (b*b-4*a*c);
*    *********** *** ***** * * * * = (-b + sqrt(D))/(2*a);
******  ** **   * * **  *** * *  * = (-b - sqrt(D))/(2*a);
 **    **     ** * *  *  *  *  *  *
 * *  *** *   *       **   
 ***  *  *  ****  *  *  **** ****   * * ********* *      = -b/(2*a);
** * **** **   **** * *****  ****    **    * * **** *   * *  * ******** =sqrt(-D)/(2*a);
  **   **       *  **  ** * **   **  ******* *  *** *   * ** **  **  *  of %.2fx^2 + %.2fx + %.2f = 0 are complex and   *    ** **  *    
** * ******  ** ** **** **  *  *** ** **  * *** ******   * ****   **  = -%.2f+%.2fi\n", realPart,imaginaryPart);
 *** ***  ** *  ** *  * *  *  ** ** ** **   *  * *     * *  = -%.2f+%.2fi", **  *    * **** *
** * *****  *****  * ***  *   
    **** *****   * *     *** if(D == 0)
* *  ***  *    *   ** * * **  *

 ** *** * * *  ****   *  * * *   **  * *   ***    ** ** **    *** **** of %.2fx^2 + %.2fx + %.2f = 0 are real and  * ******  *******
 * **** **     * ** *  * *  ***  *     * ********  **   * * * *  * = x2 = %.2f", x1);
*    ***  * *  ***** ***
*** *  ***  * *   ***  ***    *
   ****  **  **      **  **** *  
** **** *    **   * *   *** * ** ** * ** *******  *  * * * ******  **   of %.2fx^2 + %.2fx + %.2f = 0 are real and ******   * ** *
* *   ***  *  ** **  **    **      *   * *     * *   **    ** = %.2f\n", x1);
 *  *    ***    *  **** * *** * ********   ***    * *      * * *  = %.2f", x2);
   * **  *     ***   *** *
** * ****    * * *** * *      * ** 0;

}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(void)
{
**** * ** **    ** ***  **  * ** *  a, b, c, D, spD, x1, x2;
    
* *  *  * **   *  * *  * ***    **** ***  *   %lf %lf", &a, &b ,&c)==3)
    {
    * ****** * * * ***  * ** **** * *** *   ***   *   - (4*a*c);
***          ***** *   * *  **   ** ******* * 
     *  * *  **     **  *  *  *   **     *   *  *** * ** * * **  ***  * 
**     *    ** *********** * * **   ** *** * ** ** * *  *** *
*****   ***** **   *   *** ** ***    ** **  *****   *    ****  * *  *   * * * * *   * * 
* **   **    ******  ****  ***** * * **  ****        *** *   *   *  *    *   *** *** (-b+spD)/(2*a);
** *  ** *** * * **  * * * *  *  *   *  ******  * *  * * *     *  * * * ** *   *  (-b-spD)/(2*a);
  * ** ***** ***** * *   ** **  ** *     *   ******     ** ***** *  **** **   *****   (x1==x2){
* * ***     *  *  *      *** **   *** *  ***       ***  * *    *   * ** **  *  ****** *  **   **  * *** *    *   *  *    *** **  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
** **  ****** *    *  **  * *  ** *       *** ***      **** *** ** *      ** * *  * * * **
* * **  * * ** *  * *  *     * *** * *      *  **   **   *** ** * *      ******  *** ***** {
  ** ** ** *  *   *  ****** ***   **  **      ** * **    *   **  **** * **** * **** * *** **  * *    * ******  **  *  *  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
      *     *   ** **   **  ***** ** *** ** ****** ** ***   *** * ***  * ** * * *  *
* ****  ** ***    **  * *  *   ** *    ******** ** * * *  *
* * * **  * * **  ***  **  *   ** * *     **  ** *******  if(D==0)
*  * *  *****  *  ** **** * * *   **   *** *     ** * *
** *   ** * *  **  *  *    ****  * **       *   *  ***  ** ** ******   ***  *** (-b)/(2*a);
 ******  **     ******* ***   *  ***** **  * ** **      *      ******  * * **   ***   *
  ***   * * *  **  * *  *  **    **  *  *  * ** * *** * ** *    * *    ****** *
  ** ** *  *   ** *  * * * **** *  *  **   ***     * ** * ** ** ***  * ** ** *  *  * *   * ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
*      * ****      ****   *  *** ****  ** **** ****     *     **   ** ***  ** * * 
** ** *   *        ***      **  * *  ** * *  ****   ***** * *  *****  *   * * * *      
 *** *  * *    * **   **      *** **  **   **** *** **       **** **  *  ** 
 **  **   **** **    ********    **   * * ** ****  **   ***    *** *****   *  ** *
 *     *       *** * * * **    ** **  **  *** * **  * ******* **  **  * ** * ***    ***** ** **** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
* ***          **  *  ** *   *  ***** * **** ***  ***  * *** *  ***  *** *  *** * 
 ****   **  **   **** **  * ****** * ** ****  **  *  
* * ** *** **  ****    * *  * *  *    *** ***       *****  if(D<0)
 *       *** * * * ** * * **** ** *       *    ** * ****     
****    * **  * ****  *    *    ** * ******** * * ** * *  ****    ***  *   *  **  (-b)/(2*a);
*  *  *   *  ** **   ** *  ****  * **  ****        *** ***** *  **   *** * * **     -x1;
* *     ***   ** * **  ***     ***  *  * *  ** *      *  ***  ***  *    **** * **      ** ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
   ** * ***  * *   ** * *  *    * *   **** *  *** **** * 
 ************** * * **  **
    
***  *  ** ****  ** **  ****  ******  **  ** *** ****
***  *****  ********  ***  ***** *** 0;
}
answered by (-249 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdlib.h>
#include<math.h>

int main(void)
{
***  * * *** * * ****  *    * *  a, b, c, D, spD, x1, x2;
    
******** * * **  ***** **  *   * * *   %lf %lf", &a, &b ,&c)==3)
    {
*  *          * * *      ** ** * ** ** **    ** - (4*a*c);
 **    * ***      * *** **********   * ****  * * **  * *
 ** * * ** * **  *   * *    ***    * **  *   ** **  *   * ****  
 * **   ** *****    *** *  *  *  * * * ** ******* **** *
 ***  ** ***** ***  *   * * *  * **  * **  *      *  ** ** **   **  * *  ***  **    
**   ***     * **   ** * *  * *   *   ** ** **** *  *** **** **  * * *  * *** * *  **  (-b+spD)/(2*a);
****** *  **** *   * *** * * ****  *  ** **** **     *      **  * ** **   *   * *** ***** (-b-spD)/(2*a);
   * * *** ***    ** ** ***** *** *     *        *  * **    *****   * **     (x1==x2){
 ** *   ****      ***    * * * *** *******   ****  * *   * * *  * * ***    *   ** ****  *   ******   **** *    **** *    * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
** ***** * **     *  **    * *  *** * * **   ** ****** ****** ** * * ** *  
**  * **   ***  * ** *    **  * **     ** ****  **  ***** * * *  ** ******    **  ** * {
  **   ***  **  *  * * * *  * ***  * *  *** *    **  ***  *   *  ****  * * ****  *   * **   * * * *  *   ** * **  *** ** *  *    of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
 * * **       **   * *** *    * *     *  ***  *     *    ** * *  **   *    *  *  
*   *********  ** * *  ***  ** * * ** *    * *** *** **  
** ***  * ***** * *** *    **  **  **    * * * ***** ***  if(D==0)
 **    ******  * ** ***  ***   **** * * ** **** *
   ***   * **  *  *   *    ** * * ***    ** * * ***  **    *  * ***   *  *******  (-b)/(2*a);
 *  ** ****  ** ******  *** * **  **  *  **     ***** **  *     * * *    *** 
  ** **   **     * *  * **** *    * * ** ** ******       *********    ** * **  **
   *** *    *  * *  *  *  * * *    **  * ***** * ****   *  * * *  *** * * *  * * **  * *  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
***  * * * *  ** ****   * **  ***  * **  * *  ****** * *  *******  ** *  * ***** ** ** **
** *** **   *  * ***  ****  * *   *** **     *** * **  *   * * **********  * * *** *   
 ***** * * *    **  * *** * * ** ** **** **  *   **   **  **   * ** *      * * * ***** 
*  * * ****  *    *  *    *****  *  *** *   *      * * *** **     *  ****   *      ***   *
  ****  ** * * *   **    *      *******   * **  *    ** ** * *  *  *    *   *** ***   *  **    ***  of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
* **** * *  **  *    ** *    **    * * * ****   **     ** **  *   ******   ****** * *
*****  *         ** * ***  * * *    ***   ***  * * ***  
  *   * * * *  ** * *          * * *  ****   *   *** **** if(D<0)
  * ** *** * **  * *     *    ***     **  ***    ** * **     
***     *  *** *  *   ** ** * * * * * **  * *  * ***  **** **** ** ****  * ** ** * * *  ***** (-b)/(2*a);
 *** ** **   *  * ** ** * *      ***** ****** * **  * *   *     * * *  *** * *   **  *  -x1;
**    *  * **   ***** * ****   ** ***    * **** *    ** * ** ***  * ** ** ***    ** * * * *** ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
* * *  *   **  * **  **  ***  ** *****      **   **  * *   *  
*    *** *  **  *  * ** *
    
 ** *  **    *****  ** **** *   * * *** **   ** *  * *
 *  **    ** * * **  *   **  0;
}
answered by (-249 points)
0 0
prog.c: In function 'main':
prog.c:8:11: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     while(scanf("%lf %lf %lf", &a, &b ,&c)==3)
           ^~~~~
prog.c:8:11: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:11: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:18:17: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
                 printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
                 ^~~~~~
prog.c:18:17: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:18:17: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:17: warning: incompatible implicit declaration of built-in function 'printf'
                 printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf",a,b,c,x1,x2);
                 ^~~~~~
prog.c:21:17: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:29:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
             ^~~~~~
prog.c:29:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:34:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf",a,b,c,x1);
             ^~~~~~
prog.c:34:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:41:13: warning: incompatible implicit declaration of built-in function 'printf'
             printf("Roots of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
             ^~~~~~
prog.c:41:13: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(void)
{
* ** **  ** **  **  ** *  *     a, b, c, D, spD, x1, x2;
    
* *** *  *       **  *******  ******    *   **  %lf %lf", &a, &b ,&c)==3)
    {
* * ***  * *    **   ********   ** ** **   **  * ****** *  * - (4*a*c);
* * ******      *        * *   ***   ******* *** ****   *  *
 * *** ** * *  ** * ** **    * *   ** ** ****** **** 
* * * ** ** *  *  * *  **  **** *** *     **    *
 ** **   *** ** *** ***  * *** * ** * * *  ***   ****** *** *   *** * ****   *
 *  *** * **   * **  *  **** *     ***  * *    *** ***  * * *****   **** *  ** (-b+spD)/(2*a);
***  *   **** **** * **  ** *   *  * ****  *   ***     * **   ****  *  (-b-spD)/(2*a);
  ** * ** *  *  *   *   *** *      ** * * ** *  *   *   * ****  *** * *   * * * (x1==x2){
 * **  *** *   *    *  * ****** * *    *  ****   *******   *  **  *    *** *    **** *   * *** ****      **    *    ** ** * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
* *****   **     ** **     ** * ****  * **  * * ** **    ** **  *   *    *** ****  *
*** * ** *****     * *    ***** * * *  * * *** *   ** ** * **   *  ***  * * *    {
    *** * **** *****   * *  *  *   *****   * * **     *     ** **  **  *  **  *   * *  *   *******  *** * ** * **   *  ***** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and different\nx1 = %.2lf\nx2 = %.2lf\n",a,b,c,x1,x2);
 ** * ** * *  *   * **  ** **  ** *  * *** *    ** *** **    ** ******** *  **
     ***  ** * **    **** * ***   ** *  *  * * *** *** 
  * * * **  **** ** * ***   *      *  *    * *****   **      if(D==0)
 ***  **  *   *  *** **     * ***  ****  ** **  ** * *
 *** ** **   ***** * **   *   * *   ****  *   *  *  *   *  **   * ****   * ***    * ** * * (-b)/(2*a);
 *   ** **  ** *  * * ******* **  *  *     ** * * ****  *  **    *** ***  ** *
**** **  *** ****  **  ** ****  *  ***** **  ***    ***  *   *  *** *** ****  *
 *     *** **     ** * **   ****    * ****  ***  ** ** * ***  *   * * **          * *** * ** ** *  **  * * * of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
 ***** **** * **  **  *   *      *  * * *  *  ** **  **   *  *  * **  ***  
 **  *** *   * ******   **       *****     ** *      **  *** **  **   **      
 *   * **  ***  **     * *  *  *    *    * * **          * **  *** *  *** *
   *  ** *** *    * ***  *     ******** * ** * *  *  **  * **** * ****** * *  *
 * **    * ****  ****       **   * * **  ***  *  *****   * *** **   *   **** * *  * ***   ** * ** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = %.2lf\n",a,b,c,x1);
 *  * ***   * **   *** * * ***  *   *** ****    *  * * *   *   ** **   **   
** *** ** * *  *  *****      ***     **  *  * *     ****    
* * **  *   ** *  *   **   * ***   ****  ***        ** if(D<0)
**** ******** *** *** **   **  *** ** ** ****  **  * ***      
   ** *   **  *   *** * *   *    **  ** *   * **  * * ** *     * * ****  *** *  *    * (-b)/(2*a);
 * * **  * **   ****      **** *         *  * *** * **  *****     ** ** *******   -x1;
*     *   ***** * * ***   * **    * ** *     *   **** **    * ***  *  **   *     **    *   of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and different\nx1 = %.2lf+%.2lfi\nx2 = %.2lf%.2lfi",a,b,c,x1,x2,x1,x1);
 ** *** * * *** *    ***   ****   ** **** *  *** *  
*****        ***    ***  **  
    
  *******   *** *  ****** ***** *  **  *** *   * * 
* *    ***  ***  *  * * **  *** **  0;
}
answered by (-249 points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*** *   ** ***  *   *
 **  * *  ***     *  ***  * 
* *  ****  * ** *****
int ****** 
** **  * ****** **  ** *** *** ** * a, b, c, D, spD, x1, x2;
  ** * ******   *  *  **  
**    ***** *  * *  *   * * *  * * ** ***** %lf  * * ****      * * &b **      **  *
   *****   {
   * * *** ****    **       *    * *** **       ******** - (4*a*c);
  * *         * *  *    * ****** ** ** ** **  *** ******  **
 *    **       **  *  ***
* *  *        {
  **  *   * *   *  **** *   ** *** * *  * ***  ****** **** **     * *   *
 **     **** *    * **  *  ** * * * *  *** *  *** **  *  *  **    x1= *    * *  **
  ****   **** * **  *  **  *   * *  * ******** * * ** ****** *  **   *   x2=  **   * * 
  ** *  *    **  *****  *      *   * ** **  **  *    **   *   if (x1==x2){
 *** **  ****  * * *  * * ***   *** **     * ***        * **  *   **    of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 =  *  ***      *   ***
   *  *** *  ****      *  *  *   **  * *   ********* *    *** ****    
  **** ** *  *** * * ** *   ***  ***** *** *  **  **   ** **   else {
 *  * * *   * *   *     * * **  *  * **   *** **   **** *  * *  ********** * *      *    ***  **  **   of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and      ***   = %.2lf\nx2 = *   * ****   ****** *  
  *** **    * **       **** *   *  **  ***** ** * *   ** *  **   **  *  }
***** * **** ****     **  ** *   ***** ***********
 * * * * *** ** *  ** **  *****  *** * **  **  * *  **  if(D==0)
*   **  **** ** *** ****   {
**    * * ***   ******   **  * *** ** ** *  **  ****   *    **** ***    ** * ** * **  *** ****  
  **  ********* * ****      *  *   * *** * *** ** ***   **  ***  * ******    * **  *  *  *** 
 * *  *      **        {
* *   *** * **   *  **  * *  * **         ****     ** **    *******     *  *  * **  ***** ** * *   ****** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 = ***  *    ** **  *
**  *  ***    *  ****  **  *  * ** *   * * * * ** *  * * *  ********** ***  *  *** *
*** * *       *     **     * *  ***   * ****  * * ***** **   *  **   * **    *** *
*** *   * *  **   ** * * *  * ***     *      ***** * **** *   ** ** *** *   *** **** 
* *   ***           {
      ***     ** *****  *** **    ** * **     *** *  **  * *    *   **** *      **** ***  **   ***  *** of %.2lfx^2 + %.2lfx + %.2lf = 0 are real and same\nx1 = x2 =    * *    *  * **  *
** **   ***   * ***  *  * ******   **  *  ***** * *** * * *    **     *** *******  * 
 *  ** **  *** * *    * ** ** * * *  *  **    * *****
 ***   *  *     ***   **  **   ********* *** **  * * *     *      **
* **          ***  * *   
            x1= * * **
 *  *  *     ** **  ********  ***  *   x2= -x1;
 *   * * * *** *  *   *  **     * *   *  *  ** * **  *   *  *****  ** *       ** * ** * *  *   **   of %.2lfx^2 + %.2lfx + %.2lf = 0 are complex and  *  * *   =    *  * ** = *   *****  ***     ** *  
** ** *   ***  *   ***** **   ** ******* **** **  **
 * ****** * *  ***  * *** * **  *
  * **  ** ** *   *   *** * 
* *       ** ** * *  * **     ** * * ******         *
   ** * *   *  *   *  ** *    *  ** 0;
}
answered by (-249 points)
0 0
/tmp/ccvUqbC2.o: In function `main':
prog.c:(.text+0x6e): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
*    ** **   *** ** * **
** ***  *  *  **  * 
int main(){
* *           *** * **   a,b,c;
 ** *  *   *  *   *   *     D;
*     *   ***   ***    ** **     **** ** %lf   **  *   ***  **** **  *   ****       
* * ***  ** * ***    **** *  *  - 4*a*c ;

 ***** ** *  *   **     *  * ***   *   * **  of %.2fx^2 + %.2fx + %.2f = 0   *** **  * 

  ** *   *  *  *  *  ** ***  *
   ******    * *****   ***** **   *  *   *   ***   *  **    ** **  complex and  ****  * ** **
 ******  **** * **    ** * ***     *  *  *** ** *  ***  *** ** * ** * *** =    * * **  * *   (-b) / (2*a) ), sqrt(-D) / (2*a) );
***    * *   *      *  ***  * **  **    *  * *** ********  * *    *    * =   *** ****  ** (-b) / (2*a) ), sqrt(-D) / (2*a) );
  ******* ***     **** *   
**** ** ***     * * *      **  *** if(D==0){
** ** **   ***    *    * *    ****  ***   *  *** ***   ******** *  real and same\n");
 *  ****  ** **   * ****  * * **  *  **    * *** ******* * * **** * * = x2 = %.2f",( (-b) / (2*a) ) );
**  * *****   **   
 ** * **    *       **  *** ****  * **   *
      *  ****** *  ******* *******  ******   **            **   ** *  real and  **** *****  
 ****   ***  * ** *** *     *  *  ** ***   ** * * * ***    * * *** = %.2f\n",( ((-b) + sqrt(D)) / (2*a) ) );
  ** **    * *   ** * ***      *** ** **** **     *   *   ** = %.2f", ( ((-b) - sqrt(D)) / (2*a) ) );
*   *** *   **    * * 

  *  *   *** *   * ***  ** ** **  0;
}
answered by (-116 points)
0 0
/tmp/cc8OPUJA.o: In function `main':
prog.c:(.text+0x51): undefined reference to `pow'
prog.c:(.text+0xdd): undefined reference to `sqrt'
prog.c:(.text+0x13f): undefined reference to `sqrt'
prog.c:(.text+0x213): undefined reference to `sqrt'
prog.c:(.text+0x26a): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
/tmp/ccLeUfQ5.o: In function `main':
prog.c:(.text+0x51): undefined reference to `pow'
prog.c:(.text+0xdd): undefined reference to `sqrt'
prog.c:(.text+0x13f): undefined reference to `sqrt'
prog.c:(.text+0x213): undefined reference to `sqrt'
prog.c:(.text+0x26a): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include *   ***    **
#include <math.h>
int main()
{
* * * **     ** * ***     ** **** a,b,c,x,y,d;
***  **   *    ** *   *     * ** *   *  %f  **   *  * ***  ** **  ***  *  *   ***
* * * ***  * * *  *   * ***    *
  *   *  ****** ** *  **   ***  *  *  * ** 
 **  **  **  * *** * *  ***  ** *  * *
 ***** *   * **  * *  * * * * (d>0){
   * **    * * *  ***  ***      ******   ** of %.2fx^2 + %.2fx + %.2f = 0 are real and   *****      **  ** **
 ** ****   *    ******* **** * ** ***   = %.2f\nx2 = %.2f",x,y);
***  * * **** ******   *  
  **  * ******* ***     **      * if (d==0){
**    **** *        ** *  * ** *** * *   * of %.2fx^2 + %.2fx + %.2f = 0 are real and *  ** **  * 
**   ****  * **   ** *  ** *    *** *   ** *  = x2 = %.2f",x);
* * **   ***   * * *        ** 
** **  ***** *****     *  ***
*** * * **   **  *  ******** **** 
  *   **  * * *  *  * * ** * *   * **** of %.2fx^2 + %.2fx + %.2f = 0 are complex and ** **   ****   **  * 
   *** *     * * *****  ***     *  * *
 ***  ***     ***** * *   **** * ** *  = ** *   *  *******
 * ***  *** * *  *** *   ***  * *** = *** *  **** * * *
*********** *  *  ****   ***

   *****  ** * * **  ******* * 0;
}
answered by (54 points)
1 0
/tmp/ccheVQNV.o: In function `main':
prog.c:(.text+0x87): undefined reference to `sqrt'
prog.c:(.text+0xd5): undefined reference to `sqrt'
prog.c:(.text+0x21f): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
/tmp/ccJPGNPl.o: In function `main':
prog.c:(.text+0x87): undefined reference to `sqrt'
prog.c:(.text+0xd5): undefined reference to `sqrt'
prog.c:(.text+0x21f): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:104.23.243.108
©2016-2026

No related questions found

12,783 questions
183,442 answers
172,219 comments
4,824 users