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

0 like 1 dislike
9.3k 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 | 9.3k 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:172.71.1.148
©2016-2025

No related questions found

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