47 lines
989 B
C++
47 lines
989 B
C++
|
// Step 1: create the class with private and protected numbers
|
||
|
|
|
||
|
|
// Step 2: Declare the function with keyword friend. This type function has the argument as function declared class type.
|
||
|
|
|
||
|
|
// Step 3: Define the friend function outside the class.
|
||
|
|
|
||
|
|
// Step 4: Use private and protected members in that friend function.
|
||
|
|
|
||
|
|
// Step 5: Call the friend function from main.
|
||
|
|
|
||
|
|
#include <iosteram.h>
|
||
|
|
#include<conio.h>
|
||
|
|
class exforsys
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
int a,b;
|
||
|
|
public:
|
||
|
|
void test()
|
||
|
|
{
|
||
|
|
a=100;
|
||
|
|
b=200;
|
||
|
|
}
|
||
|
|
friend int compute(exforsys e1)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//Friend Function Declaration with keyword friend and with the object of class exforsys to which it is friend passed to it
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
int compute(exforsys e1)
|
||
|
|
{
|
||
|
|
//Friend Function Definition which has access to private data
|
||
|
|
return int(e1.a+e1.b-5);
|
||
|
|
}
|
||
|
|
|
||
|
|
main()
|
||
|
|
{
|
||
|
|
exforsys e;
|
||
|
|
e.test();
|
||
|
|
//Calling of Friend Function with object as argument.
|
||
|
|
cout<<"The result is:"<<compute(e);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|