C :

#include<stdio.h>
int main()
{
	int t, hh, mm, sh, sm, res;
	scanf("%d",&t);
	while(t--)
	{
		scanf("%d:%d",&hh,&mm);
		if (hh>=12)
			hh=hh-12;
		sh=hh*60+mm;
		sm=mm*12;
		if (sh>sm)
			res=sh-sm;	
		else
			res=sm-sh;	
		if (res>=360) res=720-res;	
		if (res%2==0) 
			printf("%d\n",res/2);	
		else 
			printf("%d/2\n",res);
	}
	return 0;
}

C++ :

#include <iostream>
#include <cstdio>
#include <cmath>

using namespace std;
const int NN = 101;

double calc(int hour, int min)
{
	hour = hour % 12;
	double dMperM = 360.0 / 60.0;
	double dHperM = 360.0 / 12.0 / 60;
	double dHperH = 360.0 / 12.0;

	double dMin = min * dMperM;

	double dHour = hour * dHperH + min * dHperM;

	double d1 = fabs(dMin - dHour);
	double d2 = 360 - d1;

	if (d1 <= d2)
		return d1;
	else
		return d2;

}

int main()
{
	int n;
	int nHour, nMin;
	while (cin >> n)
	{
		for (int i = 0; i < n; i++)
		{
			scanf("%d:%d", &nHour, &nMin);

			double dret = calc(nHour, nMin);			
						
			if (dret - (int)dret != 0)
			{
				int ret = (int)(dret * 2);
				cout << ret << "/2" << endl;
			}				
			else
			{
				int ret = (int)dret;
				cout << ret << endl;
			}
				
		}
			
	}

	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		String str;
		int cases = in.nextInt(), h, m, d;
		str = in.nextLine();
		for (int i = 0; i < cases; i++) {
			str = in.nextLine();
			h = (str.charAt(0) - '0') * 10 + (str.charAt(1) - '0');
			m = (str.charAt(3) - '0') * 10 + (str.charAt(4) - '0');
			if (h >= 12)
				h -= 12;
			d = Math.abs(m * 11 - 60 * h);
			if (d > 360) {
				d = 720 - d;
			}
			if (0 == d % 2) {
				System.out.println(d / 2);
			} else {
				System.out.println(d + "/" + 2);
			}
		}
	}
}