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

0 like 1 dislike
8.6k 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 | 8.6k 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:172.71.255.105
©2016-2025

No related questions found

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