Add files via upload

Author: madhurimarawat

Friend/Friend function/add.cpp

@@ -0,0 +1,30 @@
+#include<iostream>
+#include<stdio.h>
+using namespace std;
+class calculation{
+//wap for friend function
+  int a;
+int b;
+private:
+  int sum=0;
+public:
+void set(int c,int d){
+a=c; b=d;} 
+friend void add(calculation c);
+friend void sub(calculation c); 
+};
+ void add(calculation c1){ int sum=c1.a+c1.b; cout<<"Friend function 1 called \n"; cout<<"Sum is:"<<sum<<endl; }
+void sub(calculation c1){ int sub=c1.a-c1.b; cout<<"Friend function 2 called \n"; cout<<"Sub is:"<<sub<<endl; }
+int main(){
+int x,y; 
+cout<<"Enter first number:"; 
+cin>>x;
+cout<<"Enter second number:"; 
+cin>>y;
+calculation c;
+c.set(x,y);
+add(c);
+sub(c);
+return 0;
+}
+