UVa OJ - 579 ClockHands

The following program is my ACcepted code for UVA-579.
It's a for everybody to learn and discuss.
If there is any mistake or comment, please let me know.  :D

此乃UAV 579的AC code!
歡迎一同討論學習，如有錯誤與任何建議請留言 : )

//This program is for UVA 579 ClockHands



#include<stdio.h>
#include<stdlib.h>
#include<iostream>
#include<math.h>
using namespace std;

int main()
{
    int h, m;
    double ans;
 
    while(scanf("%d:%d", &h, &m)!=EOF)
    {
        if(h==0 && m==0)
            break;
     
        //printf("%d %d\n", h, m);
        if(h == 12)
            h = 0;
         
        ans = fabs( 30.0 * h + 30.0 * ( (double)m/60.0) - (double)m * 6.0);
     
        if(ans > 180.0)
            ans = 360.0 - ans;
     
        printf("%.3lf\n", ans);
    }
    return 0;
}