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

0 like 1 dislike
19.7k 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 | 19.7k 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:162.159.115.10
©2016-2026

No related questions found

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