Write a program to compute the real roots of a quadratic equation

main.c

//
//  main.c
//  assignment
//
//  Created by Md Mazedul Islam Khan on 3/6/15.
//  Copyright (c) 2015 Md Mazedul Islam Khan. All rights reserved.
//

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

int main(int argc, const char * argv[]) {
    float a, b, c, eqn, eq1, eq2, real, roots;
    printf("Please insert the value of a, b and c:\n");
    scanf("%f %f %f", &a, &b, &c);
    eqn = (b * b) - (4 * a * c);
    if (eqn > 0) {
        eq1 = -b + sqrt(eqn) / (2 * a);
        eq2 = - b - sqrt(eqn) / (2 * a);
    } else if (eqn == 0) {
        eq1 = eq2 = - b / (2 * a);
        printf("Roots are: %.2f	and %.2f", eq1, eq2);
    } else {
        real = - b / (2 * a) ;
        roots = sqrt(- eqn) / (2 * a);
        printf("Roots are: %.2f and %.2f", real, roots);
    }
    return 0;
}