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

0 like 1 dislike
9.1k 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 | 9.1k 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:172.70.126.66
©2016-2025

No related questions found

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