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:104.23.197.207
©2016-2026

No related questions found

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