Page 153 - DCAP404 _Object Oriented Programming
P. 153
Object-oriented Programming
Notes 7.4.1 Using Friend Function
The following program is the same as previous one. The only difference is that we use a friend
function to find the sum of two objects. Note that an argument is passed to this friend function.
#include <iostream.h>
#include <conio.h>
class integer
{
private:
int val;
public:
integer();
integer(in tone);
friend integer operator+ (integer obja, integer objb);
void disp();
};
integer::integer()
{
val = 0;
}
integer:: integer(int one)
{
val = one;
}
integer operator+ (integer obja, integer objb)
{
integer objsum;
objsum.val = obja.val + objb.val;
return(objsum);
}
void integer::disp()
{
cout<< “value =”<< val <<endl;
}
void main()
{
integer obj1(11);
integer obj2(22);
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