2-3

#include<iostream>
using namespace std;
class Time
{
 public:
 void cin_Time();
 void cout_Time();
 private:
 int hour;
    int minute;
    int sec;
   
};
int main()
{
 Time t;
 t.cin_Time();
 t.cout_Time();
 return 0;
}
void Time::cin_Time()
{
    cin>>hour>>minute>>sec;
}
void Time::cout_Time()
{
 cout<<hour<<":"<<minute<<":"<<sec;
}