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

0 like 1 dislike
5.3k 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 | 5.3k 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:172.69.6.191
©2016-2024

No related questions found

12,783 questions
183,443 answers
172,219 comments
4,824 users