C code of solving Quardratic equation

#include<stdio.h>
#include<math.h>
//code by rajendra
main(){
    int a,b,c,d;
    float root1,root2;
    printf("enter the coefficient of a,b,c \n");
    scanf("%d%d%d",&a,&b,&c);
    d=b*b-4*a*c;
    if(d>0){
        root1=(-b+sqrt(d))/(2*a);
        root2=(-b-sqrt(d))/(2*a);
        printf("first root is = %f and second root is = %f\n",root1,root2);
    }
    else
    printf("root are imaginory");
}