Write a C++ program to swap two number by both call by value and call by reference mechanism, using two functions swap_value()..........

Write a C++ program to swap two number by both call by value and call by reference mechanism, using two functions swap_value() and swap_reference respectively , by getting the choice from the user and executing the user’s choice by switch-case.

Implementation of the above problem:

#include<iostream.h>

#include<conio.h>

void main(void)

{

clrscr();

int x,y,n;

void swap1(int,int);

void swap2(int*x,int*y);

cout<<"enter two values to be swapped\n";

cin>>x>>y;

cout<<"\nfor CALL BY VALUE press1";

cout<<"\nfor CALL BY REFERENCE press2";

cin>>n;

switch(n)

{

case 1:

cout<<"\nCALL BY VALUE";

cout<<"\nvalues before swap()"<<x<<"\t"<<y;

swap1(x,y);

cout<<"\nafter swap outside of swap1()";

cout<<"\nx="<<x<<"\ny="<<y;

break;

case 2:

cout<<"\nCALL BY REFERENCE";

cout<<"\nvalue before swap"<<x<<y;

swap2(&x,&y);

cout<<"\nafter swap(outside of swap2)"<<x<<y;

break;

}

getch();

}

void swap1(int x,int y)

{

int temp;

temp=x;

x=y;

y=temp;

cout<<"\nswapped values(inside swap1())"<<x<<"\t"<<y;

}

void swap2(int *x,int *y)

{

int temp;

temp=*x;

*x=*y;

*y=temp;

cout<<"\nswapped value(inside swap2())"<<*x<<"\t"<<*y;

}

Thanks

Mukesh Rajput