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

0 like 1 dislike
17.4k 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 | 17.4k 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:104.23.197.94
©2016-2026

No related questions found

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