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

0 like 1 dislike
11.6k 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 | 11.6k 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:172.71.254.36
©2016-2025

No related questions found

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