/* 
 * Example of using C library functions
 *
 * Compute two roots of the quadratic equation 
 * a x^2 + b x + c = 0 when discriminant > 0 
 * Hanly and Koffman, Example 3.2, page 110 
 *
 */ 

#include <stdio.h> 
#include <math.h> 

int
main(void)
{
    double a, b, c; 
    double disc, root_1, root_2; 

    printf("Input the coefficients of the quadratic equation a, b, c > "); 
    scanf("%lf%lf%lf",&a,&b,&c);    

    printf("coefficients a = %.2f, b = %.2f, c = %.2f\n",a,b,c); 

    /* compute two roots for discriminant > 0 */ 
    disc = pow(b,2) - 4 * a * c; 
    root_1 = (-b + sqrt(disc)) / (2 * a);  
    root_2 = (-b - sqrt(disc)) / (2 * a);  

    printf("disc = %.2f\n",disc); 
    printf("root_1 = %.2f, root_2 = %.2f",root_1,root_2); 

    return (0);  
}