#include<iostream.h>
class time
{
private:
int hour,minute,second;
public:
time(int h=0, int m=0,int s=0)
{
hour = h; minute = m; second = s;
}
time operator ++()
{
second++;
if(second==60)
{
minute++;
second=0;
}
if(minute == 60)
{
hour++;
minute=0;
second=0;
}
if(hour == 24)
{
hour=0;
minute=0;
second=0;
}
return *this;
}
time operator --()
{
if(second==0)
{
second=59;
minute--;
}
else second--;
return *this;
}
void display()
{
cout<<hour<<" : "<<minute<<" : "<<second<<endl;
}
};
void main()
{
int i;
time a(12,23,57);
while(1)
{
a++;
a.display();
for(i=300000000;i>0;i--);
}
time b(12,34,00);
b--;
b.display();
}