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

0 like 1 dislike
7.6k 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 | 7.6k 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:108.162.216.50
©2016-2025

No related questions found

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