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

0 like 1 dislike
12.2k 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 | 12.2k 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:172.70.80.170
©2016-2025

No related questions found

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