friend functions c++
In object-oriented programming, a friend function that is a “friend” of a given class is allowed access to private and protected data in that class that it would not normally be able to access if the data was private.
Example
#include <iostream>
class B
{
private:
friend void privatePrint()
{
std::cout << "friend functions" << std::endl;
}
};
class A
{
public:
A()
{
// no need to access private part with public members of B
privatePrint(); // direct calling
}
};
int main()
{
A a;
getchar();
return 0;
}
Output :
friend functions
