C++ example with and without friend function

C++ example with a program with friend function

C++ Program without friend function

#include <iostream>
using namespace std;
class one {
private:
int n1=1;
public:
int add(one object1)
{
return (object1.n1 + 1);
}
};

int main()
{
one object1;
cout<<"Sum: "<< object1.add(object1);
return 0;
}

#include <iostream>

using namespace std;

class one {

private:

int n1=1;

public:

int add(one object1)

{

return (object1.n1 + 1);

}

};

int main()

{

one object1;

cout<<"Sum: "<< object1.add(object1);

return 0;

}

C++ Program with friend function

#include <iostream>
using namespace std;
class one {
private:
int n1=1;
public:
friend int add(one);
};

int main()
{
one object1;
cout<<"Sum: "<< add(object1);
return 0;
}
int add(one object1)
{
return (object1.n1 + 1);
}

#include <iostream>

using namespace std;

class one {

private:

int n1=1;

public:

friend int add(one);

};

int main()

{

one object1;

cout<<"Sum: "<< add(object1);

return 0;

}

int add(one object1)

{

return (object1.n1 + 1);

}

C++ example with and without friend function
By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

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