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

0 like 1 dislike
17.3k 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 | 17.3k 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:104.23.243.202
©2016-2026

No related questions found

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