Write A C++ Program To Depict Passing Of Objects By Its Value.

#include<iostream.h> 
 #include<conio.h> 
 class time 
 { 
       private: 
                        int h,m; 
       public: 
                       void readt(); 
                       void addt(time,time); 
                       void showt(); 
  }; 
                       void time::readt() 
                 { 
                        cout<<"\nEnter Time in Hours and Minutes : "; 
                        cin>>h>>m; 
                 } 
                       void time::addt(time u1 ,time u2) 
              { 
                        int min=u1.m+u2.m; 
                        int hrs=min/60; 
                        m=min%60; 
                        h=hrs+u1.h+u2.h; 
              } 
                        void time::showt() 
             { 
                        cout<<"\nTime obtained on adding = "; 
                        cout<<h<<":"<<m; 
              } 
                       void main() 
               { 
                        clrscr(); 
                        time ob1 ,ob2,ob3; 
                        ob1.readt(); 
                        ob2.readt(); 
                        ob3.addt(ob1,ob2); 
                        ob3.showt(); 
                        getch(); 
                }