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

0 like 1 dislike
12.2k 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 | 12.2k 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!
#include <stdio.h>
**  *   ****  *** *  * 
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 real and  *** ** * *** * * * *  
***    ***     * **     ** *** ********* * ***  * * *** * ***  ** = %.2f\nx2 = %.2f",x1,x2);
 ********     **  *      * 

******** ** ****  *  *  ** ****    if(D==0)
    ** * * ** *** **  *
* *** **  * ****  *** *  **** *   * *** **  **  ***    *  * *  * ** ***  * * * *  of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
   *    **  * *** ***** *  *  *  * * * *** *  ** ** * *** = x2 = %.2f",x1);
 **   *  *** *   * * *** 
  **   *  * *  *** * ** *   * *      
  ** ** *******  * *** ***
 * *   *     *****   * ** * **  * **   *   *    **  **  ****     of %.2fx^2 + %.2fx + %.2f = 0 are complex and    **   *   **   **** 
*** *  * ** *     * ** * *****    * *** * *     * ***     ***  **   **** =   ** **   ***   **   * **  * **   
*  ** * **   **   **  **  *** *  * *   * *** ****  ****  ** * **   **   * = * *    * ***  ** * *** ** 
  * * ****  *     ***   *   * *
 * ****  ** *   * **** *  * *   0;
}
answered by (-281 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 <stdio.h>
***    * *  * *  *  *
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 %.2f x^2 + %.2f x + %.2f = 0 are real and   *  * * **  * **   *   
 **  **  * * *  *   * *** ** **   **** ** *    **** *    **  ***  ****   = %.2f\nx2 = %.2f",x1,x2);
  *  * *****  * **** *** * 

    *   * **** *  ** ***  ** *    if(D==0)
* * ****** *   ****  * *** **
  * * **** **   **   * ** * * * **** * ***   ** *****  **    * ** **     *    of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
 ***  ** * *   * **  *   ****   *   *  *   * * *   *    *   * ** = x2 = %.2f",x1);
*  **  ***  ***  **   *** *
  ****  * **  **     **** **** 
 * *   ** **  * **   *  *  **
 *    ***   ** * *    ****** ** * * *  ***   ******* *  * ******   of %.2fx^2 + %.2fx + %.2f = 0 are complex and  *** *  ***  **  
  ***** *  **** *** ***    **     * *     *  **   * *****       = *  **  * * ** *****     ***   *  * 
 * * * *  ***   * * *  ** ***    *** * *  * ***     * * * * *** **    = **** * * ** ***** **  ****** 
     **** **  *   ** *  ** *  
**  ****    *  ** * **  **** *** *   * 0;
}
answered by (-281 points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
Case 3: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>

int main()

{
      * ****   *  *   *  *  *   a,b,c,x1,x2,D=0;
       ** * * *  **** *** *    
* * ** * * ****   ****   *** *  * *  *  %f   *  * *****  ** ** *** ** * *  
*  **  **   * **  ***   **** **
 **   ******     ************ *** 
* ** * **    * ** *  *   **  **** * + sqrt(D))/(2*a);
* **  **   * * *** ** **     *   - sqrt(D))/(2*a);
***  ****    * * * * * **
*** * *** ***   *  **   **   * *
** * *  * **     ******     
 * ** *** ****   ***** * *  ***   ***   *   *   * ***   **  **    of %.2fx^2+%.2fx+%.2f=0 are complex and     *  *   *  * ** *  ** **  * * * 
  * * * ** ******* *   ** 
* *    *  *** **** *    **
* * **  ** * **** ****      * if(D==0)
       *** * *  **** ** *
 **   *    ***** **   ** **  * ****  * *   ******  * *  **   ***   * of %.2fx^2+%.2fx+%.2f=0 are real and same\nx1=x2=%.2f",a,b,c,x1);
****    * ** *** **** *  * *** **
* **** *  * ** ** ****** **   **
** **   *    ***     ** ** ** 
   *** *  * * **  ***   **
 *   ** *** * ** *     *    *** * *   *   ** ** *  * **  *******    ** ** of %.2fx^2+%.2fx+%.2f=0 are real and  *** * *  * **   ** * ** **  * 
*  ** ****** *  *  * * * *   * 
 * *  * *  ***    * *****
 ** * *** ****  *** *    
** **  * * * * * *  *** *  * ** * 0;
}
answered by (-127 points)
0 0
prog.c: In function 'main':
prog.c:12:14: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1=(-b + sqrt(D))/(2*a);
              ^~~~
prog.c:12:14: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:12:14: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
**     ***   * *  * 
int main()
{
   ***  **       * *  **   * a,b,c,D;
  *****  * * *  ****  *   *      * x1,x2,r,i;
 **  ** *  *  ** * * *  *  *** **   * * ***   * ** * *  * **   * *  *
* *** *    ****  ***   **   * **  * * 
 *** ***     **  ** *  *     *  *****   
  **   *****  *   **  * * **   * ** *  
   ***  ******    * ************ ** *
*  *** ***   *  ***  **   
 **    *       ** *  * * **** ****  *   ***  *  *    ** ****** of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
*   * * *  *** * ******* * *  *** *** * ** * * * ** ******* **** *    ** = x2 = %.2f",x1);
 *****   ** * **   * 
**   * **   *    * ***  **    if(D>0)
  **   *   *  *   **      *
* ** * ** **  ****  ** * *  ***   * **  * **** ** * *** ** *** *  * *  * * of %.2fx^2 + %.2fx + %.2f = 0 are complex and    * ***  *   
  *  * * ** ******* ** *   *  *  * ****  * ***  *  *    *    **      = %.2f\n",x1);
*   *  *** * *  *   *    ***  ***  * **   * ***   * **  * *   * **   = %.2f",x2);
 **** * *  * * * **** *  
*** **  ***   * * **   *    **  if(D<0)
 ** * ***   **    **     * * **  
***  *** ** ** **  * * * **  **       *    *** **   **** ****   of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
*  ** *   **     *** **  *    **    **    *     * * -b/(2*a);
* **** * ****   ** **   **  ******  *    * * **** **** * *   * ***** ** *
     **** **  * *  * **** *   * *** ** * *   ** ** * ***    *     = %.2f+%.2fi\n",r,i);
 **  *  ***   *** *  ****** *    ***  **  ** ****  ***  *****      = %.2f-%.2fi",r,i);
***** **  ** ***     **  *
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:6:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%f%f%f",&a,&b,&c);
     ^~~~~
prog.c:6:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:6:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:12:9: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
         ^~~~~~
prog.c:12:9: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:12:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:17:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
         ^~~~~~
prog.c:17:9: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:23:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("Roots of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
         ^~~~~~
prog.c:23:9: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
 *  * *  ***   *
int main()
{
*** **    * ** **  *  **  a,b,c,D;
** * *  *     ***      *     ****   x1,x2,r,i;
**  ** *** ***** * **** * * ** * *     **  *     ***  ***  ***  ** ***
  *   ****  * *       * * *   *  ** * 
 *  *   *       ** *** ***  *  * *** * * *****  
 *  * * * *** **    *   ** ********  *    *  * *
  * ****** ****  ***  * *  ****  
   * ** * *** * **   ** 
**    * * *            *  * ***   * **  * * * ** *   ****    **** **   * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
** * *** ** *    *** ** * ** **  * ***  ** ** *  ***  ***   *    = x2 = %.2f",x1);
 ***** ** **  **  * **    ******
  * ****  ** ***   **   * **   ** if(D>0)
** * ** * * * ***   ******
**  *  * *       ***** **    * * *  *** * *  * *****   * ** * ** *   * * of %.2fx^2 + %.2fx + %.2f = 0 are complex and    * * *  **  ** * **** *
** * * *** ***  ***  *   *  *  * *    **  * ** *** * * **   *** ** *   = %.2f\n",x1);
*       **     **  *   ** * * *** *  * * **  *  ****** **  ****** ** = %.2f",x2);
 ** * * *  **  *   *** *  * * 
* *  *  ** ** *   ** *  ***  if(D<0)
 *   *  *    ****   *****     
* ***** **    * * ** *****   ***  ** * *  *  * *    **    ****      **** of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
 ** ***    ****  *  * *  * **  **  * *  *  * *****  * -b/(2*a);
**    ** **    *     * *    *    * *  ** *  ** *** **  ***  ***    ***
***** *    **** ***** *  **  *  ** * * *   * *** ** ** **     = %.2f+%.2fi\n",r,i);
 * ** **   **      ** * *  **   **** *   ** *    ** ***  * ***   = %.2f-%.2fi",r,i);
*  *  **   * *  * ****  ****
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:8:12: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
     x1=(-b+sqrt(D))/(2*a);
            ^~~~
prog.c:8:12: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:8:12: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{
  *  *  **********  **  * a,b,c,d,x1,x2;
   ** *   **  **   * *  *   *      ***  *  *** *        * ***     ** * **
*    *****   *    *    **    ***  *
*** *  * ***** ****            ** **    ***
*****  * ***  * **   *    ** *   * **
    ***  *       ** * *  * *   ****  *  
   *   * *  ***** * **** **
*  * *** ***** * *** *  ******* *** *   * *** * ***  ***   *** of %.2fx^2 + %.2fx + %.2f = 0 are real and ** * ****  * *  *** *
*** * ** **  **  ** **  ****** *  **      * *** ** *  **** **  *        = %.2f\n",x1);
*  **    ** * *  ** *** * ***    ******  **   **** ****  *    = %.2f",x2);
* * * *** ****  *  * *
*    ***    * *   ** ******* if(d==0)
 ** ***** **  * * *** **   *
*** * ********** *******  *  *       *  ****       * *  *  ** *  **** ** * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
** ****     * ** * ** **  *  *  *   ** **** *       *  *  **    ** **      = x2 = %.2f",x1);
** *  *   * **  * *  * * *  
**    **  **       ** * ** * *
 *   ***   *** **  *   * ** *
**** **** *    *** **  *** * * **  * * **   *  * ** * *  * * of %.2fx^2 + %.2fx + %.2f = 0 are complex and  *   ** ****   **
 ** ** **    * * *****   * *** *** * **   ***** *** * *  ***   *** * = *** *  **  ****   **   ** * **
* * *** **  * * ***  **   ** *** **** *   ***  * *  * ** * *  *  =      ** ** ****  ****   *** *
**  ***   *  * *    * *
 * ****   *     * *   * **  * 0;
}
answered by (-498 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 <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()
{
    ** *** * * * *   *** ***  * a,b,c,d,x1,x2;
*  **  * * * * ***   *   **** *****  * **    ****  **   **   ***    *  * * *
   *** *******   * ** **  * * * **
**     *  ***   **   *  ** * * * = (-b + sqrt(d))/(2*a);
  *   ****  ******* ** * *** ** = (-b - sqrt(d))/(2*a);
  ** ** * **     *  **   *  *  **   *  ** 
 * ** ***  * **  *   *  ** * * * ** ** * * *   ** ** * *  ****** of %.2fx^2 + %.2fx + %.2f = 0 are real and different\n",a,b,c);
* ** *   *** ***    *  * ***** *  *** **    *   *    ****    ** *   **** **** * **    ** * * ** *** * * *  **** *  **   * **   *  ** *   **   ** ***  **  * ** *  * *  *** *  * **     * *   **** *  * *  ** ***  *  * * * = %.2f\n",x1);
********** ****   * * *  * *  *  **   *  * *   *****  * * **  *   ** ** * * * * * *   *   ** **    ** * *    * *  **  *   **  ** ** ****  **     *       *** * **  ***  *  **    * * *  ** * *   *  *   *  *       * **      *  * **  *** ** ****  = %.2f",x2);}
    *  ********   **** ****  if(d==0)
**     * * *** **    * *  ** *  ***    *    *
  ** * *** ** * * *** ** * *** **** * * **** *******      * ** ** * ** *  *     ** * *   *  of %.2fx^2 + %.2fx + %.2f = 0 are real and same\n",a,b,c);
  ***** *** ***   ** *  ***    ** * *  * **  **** ** ** ***  *****   **  *  * ** *   *   ** ***  ***    **  * **   *******  ** **  **** **   ** = x2 = %.2f",x1);}
***  * *** *** **  *  * *  
 *   **** ** *  *  **  *        *** ****** * *****  ** *   *    *  ** **** * of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\n",a,b,c);
** * ** * **  * *  *****      * ** * *** **    *   ****** **  *** ** = ****  *   ***** *   ** * ** *
      ***   *   *** *  * ***  *** **   * **  *** *  * *   *** = *  **   *****  **    *     ** *
  ** *   *    *  * **   0;
}
answered by (-108 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 **   ***  ** *
#include    *    ***    

int main()

{
    *    **  ** *     ***  * *   *      ** **** 
*** ***  ***** *****  *  ****   **   *  %f * * **   *** *   *   *  ** *** 

 * *  **    ** * ** *  ** * *** **
** * *** * ****             ****** + sqrt(D))/(2*a);
**  * ** ***     ***    * * ***** **  - * * * *  *
 * * * **   ** *  *       ***** ** *
 ** ***** *   ***** *  * *****  ** **

    **     * *   *  * **  *  ** * (D==0)
  * ***      *** ***  * *  
*  ***  *  ****  **          ** * **  *    **  * * * *   *** *   ** **  of %.2fx^2 + %.2fx + %.2f = 0 are real and same\nx1 = x2 = * *  **   *  *   
 * **  * ****   ** **   *  **  
  *  *   ****    * **     ******  if (D>0)
*** * * ** **   * * **  *  *** 
  * *      ***     *       * * *   * ***** ***   **  *  **  *    *   * of %.2fx^2 + %.2fx + %.2f = 0 are real and different\nx1 = %.2f\nx2 = **  ** * **  * * * * 
*  **** ***     **  * **  * 
  *    *     *** ** *     ** 
 * * *** **    *     * **  *    
*  *** ****** ** *  ** * ****     *  * * *  *   * ***  ****  * *    **  of %.2fx^2 + %.2fx + %.2f = 0 are complex and different\nx1 = %.2f+%.2fi\nx2 =  * **** *  *  *  *** *   * * *** 
******  *** *   ***  * **  * *

** ***  * ******* * *     * * 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   ** ** **** *  *  
#include   *   ** * **** *
int main(void)
{
float a,b,c, D, x1, x2,i;
 * * *** *******    ** * *  ** * ** *   %f    * * &a, &b, &c);
      ** * **  *  ***   ****  * 
**** * ** **    * *    * * * (D>0)
***  *** * *** **     *  * **   
*  ****  *  *   * ****  *      ****  * *    **** * ***    *** * 
      *  **   *   * * **  *** *  ** ***   ** *    * **       *   **   * **  

**   *   **** *       ** *  ******* * **       ** **     *  *    * * ** * ** ***    ***   of %.2fx^2 + %.2fx + %.2f = 0 are real and *   *    * * = %.2f\nx2 =       ** * **  **    
**   * **  **** **** ****    
*   *     *          **** * if (D==0)
*  **  ** **  * ** ****  
* * ***      *  **    ***   ** ** ****  * **   *   *   *  *  
*  *  *** * *  ***  *** ** *  *** ****  ** ** * ***** *  ***  * *  * of %.2fx^2 + %.2fx + %.2f = 0 are real and same\nx1 = x2 =  *     *    ****
   **     *  * * * *   *
    *   **** **    *****  ** *  
*   *  *   ***** **   **  ** *
    * * * * *  **** *  *  *  * **  **   x1=x2 = -b/(2*a);
****   * * ***** ** * **   *    * ***     ** *  * * ****  * * **** *
*   ****    *    ** ** * *  ***** * ** **  ***** ** ** ** *  *  ***    of %.2fx^2 + %.2fx + %.2f = 0 are complex and **  * *   =  **    ** =   *     **  *   * x2,i);
** **   *     *       * 



     *  ** ** * *   *** **    **   0;
}
answered by (-304 points)
edited by
0 0
prog.c: In function 'main':
prog.c:10:16: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
         x1=(-b+sqrt(D))/(2*a);
                ^~~~
prog.c:10:16: warning: incompatible implicit declaration of built-in function 'sqrt'
prog.c:10:16: note: include '<math.h>' or provide a declaration of 'sqrt'
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Wrong output
Case 3: Wrong output
commented by (4.3k 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 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:21:5: error: expected ';' before '{' token
     {
     ^
commented by (4.3k 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 0
Case 0: Correct output
Case 1: Correct output
Case 2: Wrong output
Case 3: Correct output
commented by (4.3k 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  ** ***  *  *
#include  * *  *** *** 

int main()
{
* * *  * ***  ***  **   *   **** a, b, c, * * * *  * x1,x2, realPart,   *   *** 


** *  * *   ** * ****  * *** * **    *  %lf * *** *** ** *  &b, &c);


 *** *    ** ***      * ** ** *** **   = b*b-4*a*c;

 *  ** *  **  *  ** * * ** * condition for real and different roots


 * **** *  **  **** *  *  *** * ** **** for real and equal roots
 * **     ** * *      *** ** ***  *  *** (determinant == 0)
  *   *** **  ** **  **  **  **
 *  * * ***    **   * **     *  ****  * *** ***   = x2 = -b/(2*a);
  *  **   ***   *   *** **   ***  * *     ****  * * *  *  ***   **  * * of %.2fx^2 + %.2fx + %.2f = 0 are real and  *  *****    * a,b,c);
 ******      *** **    ** ***  **    * **  *** *  **   * *  * *      = x2 = *   * ***  x1);
**   * **  **  *  *    **  *

***   **     *****   ** * ****   *    ***** if (determinant > 0)
  * *    *  *   * * *** * * 
  * ** **  * *  **    **   *** sqrt() function returns square root
    *  *  **** *** **   ****  * * *** ***** *  *** *** ** = *   *  **  ** *  *  ***
**** *   * *   **   ****    * **  **** **** * *   = *        ***  ** 

 *    ***  **  * **    ***** *** *** *  *  ********   **   * **   of %.2fx^2 + %.2fx + %.2f = 0 are real and   ****     *      
*   *  ** *  **  * * * *** *  **  * *  *   **    *   *** *   = *  **  *  *  x1);
*   *** *** ***  *** *   ** * *     ** *       ** ** *   * * = *  ** * x2);
**  ** *  *** *** ***  **  ** if roots are not real
 * ** * ** *  ***    *  * * * 
 ** **** ***** *    ** * **** 
     * *    **  **  *   * ***     ** **  *   ** *    ***** ** *    = -b/(2*a);
* **    * ** *  * * * **** *    **  *  * *** ** ***   = * *   * * * *  
 *  * *    ** * ** *     **   *** * **** * ** ** *  * *       * *** of %.2fx^2 + %.2fx + %.2f = 0 are complex and  *   **   ***  a,b,c);
** *    *  ***  *  *  *   ** * ** *  *  *  *   *      ***  ****  =  *   ***** ***   realPart, *     *****
***  * *    **   *  ** *****    ******  ***  * *    *   * *  *  ** = *   * * **** * realPart,       ** * 
 * ** * * *** ******  **** 

 *      ** *** *   *** *  * **  * 0;
}
answered by (-167 points)
0 0
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:172.69.214.38
©2016-2025

No related questions found

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