UVa 579 ClockHands Solution

#include<stdio.h>
int main()
{
int h,m,a,b;
float d;
while(scanf("%d:%d",&h,&m)==2)
{
if(h==0 && m==0)    break;
if(h==12)
h=0;
a=h*5;
if(a>=m)
b=a-m;
else
b=m-a;
b=b*6;
if(m>a)
d=(float)b-(float)m/2;
else
d=(float)b+(float)m/2;
if(d>180)
d=360-d;
if(d<0)
d=d/-1;
printf("%.3f\n",d);
}
return 0;
}