UVA - 579 - ClockHands (2nd Solution in C)

#include <stdio.h>

float min(float x,float y){
    if(x>y)
        return y;
    return x;
}

float abs(float x,float y){
    if(x>y)
        return x-y;
    return y-x;
}

int main()
{   int x,y;
    while(1){
            scanf("%d:%d",&x,&y);
            if(x==0 && y==0)
                break;
            if(x>11)
                x-=12;
            float secondangle=(float) (y*6.0);
            float firstangle=(float) (x*(30.0)+30.0*(y/60.0));
            float ans=abs(firstangle,secondangle);
            ans=min(360-ans,ans);
            printf("%.3f\n",ans);
    }
       return 0;
}