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:104.23.243.109
©2016-2026

No related questions found

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