Digital-Systems-Assignments/Assignment 6/abc.c

/*
 * Student: S.K. Soekhlal
 * Number: 4860632
 * Assignment: 3.6
 */ 

#include<math.h>

double x1real,x2real,ximag;
extern int a,b,c; /*Variables stored in another file*/

static float discriminant(){
    return (pow(b,2)-(4*a*c)); /*Calculate Discriminant */
}

void abc(){
    float D = discriminant();
        if (D>0){   /*Calculate x1real and x2real if D>0*/
        x1real = ((-b+sqrt(D))/(2.0*a)); /*Use 2.0 instead of 2 so a float is calculated instead of an int*/
        x2real = ((-b-sqrt(D))/(2.0*a));
        ximag = 0;
    }
    else if(D<0){   /*Calculate x1real and ximag if D<0*/
        x1real = -b/(2.0*a);
        x2real = x1real;
        ximag = (sqrt(-D)/(2.0*a));
    }
    else{   /*Calculate x1real if D=0*/
        x1real = -b/(2.0*a);
        x2real = x1real;
        ximag = 0;
    }
}