C :

#include<stdio.h>

int main()
{
	int sh,sm,fh,fm,SM,FM,pass;
	puts("Initial time  Final time  Passes");
	while(scanf("%d%d%d%d",&sh,&sm,&fh,&fm)!=EOF)
	{
		SM=(sh%12)*60+sm;
		FM=(fh%12)*60+fm;
		pass=(int)(FM/720.0*11)-(int)(SM/720.0*11);
		if(SM>FM)
			pass+=11;
		printf("       %02d:%02d       %02d:%02d%8d\n",sh,sm,fh,fm,pass);
	}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int sh,sm,fh,fm,SM,FM,pass;
	puts("Initial time  Final time  Passes");
	while(scanf("%d%d%d%d",&sh,&sm,&fh,&fm)!=EOF)
	{
		SM=(sh%12)*60+sm;
		FM=(fh%12)*60+fm;
		pass=(int)(FM/720.0*11)-(int)(SM/720.0*11);
		if(SM>FM)
			pass+=11;
		printf("       %02d:%02d       %02d:%02d%8d\n",sh,sm,fh,fm,pass);
	}
	return 0;
}

Java :

import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	public static void main(String[] args )
	{
	int sh,sm,eh,em,pass,i=0,smin,emin;
	Scanner sc = new Scanner(System.in);
	 PrintStream ps = new PrintStream(System.out);
	while(sc.hasNext())
	{
		sh= sc.nextInt();
        sm= sc.nextInt();
        eh= sc.nextInt();
        em= sc.nextInt();
	smin=(sh%12)*60+sm;
	emin=(eh%12)*60+em;
	pass=(emin*11)/720-(smin*11)/720;
	if(emin<smin)pass+=11;
	if(i==0){ ps.printf("Initial time  Final time  Passes\n");i++;}
	ps.printf("       %02d:%02d       %02d:%02d      %2d\n",sh,sm,eh,em,pass);
	}
	}
}