Program of call by value and call by reference

#include<stdio.h> #include<conio.h> #include<iostream.h> #include<process.h> class swap { int a,b; public: void get() { int choice; cout<<"Enter first value : "; cin>>a; cout<<"Enter second value : "; cin>>b; cout<<"Which function will you call"<<endl; cout<<"Press 1. for call by value"<<endl; cout<<"Press 2. for call by reference"<<endl; cout<<"Wrong input will terminate the program"<<endl; cout<<"Enter your choice : "; cin>>choice; clrscr(); cout<<"Values before swapping : "; display(); switch(choice) { case 1: swap_v(a,b); break; case 2: swap_r(&a,&b); break; default: cout<<"You entered wrong choice, Program will be terminate."; getch(); exit(0); } cout<<"Values after swapping : "; display(); } void swap_v(int a, int b) { int temp; temp=a; a=b; b=temp; } void swap_r(int *a,int *b) { int *temp; *temp=*a; *a=*b; *b=*temp; } void display() { cout<<endl<<"Value of a is : "<<a<<endl<<"Value of b is : "<<b<<endl; cout<<"Press any key to continue..."<<endl; getch(); } }; void main() { clrscr(); swap s; s.get(); }