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

0 like 1 dislike
19.7k 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 | 19.7k 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:162.159.115.9
©2016-2026

No related questions found

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