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

0 like 1 dislike
11.6k 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 | 11.6k 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:172.70.115.212
©2016-2025

No related questions found

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