Swap two numbers using function.

//Program to swap two numbers using function.
#include<iostream.h>
#include<conio.h>
void swap(int&,int&);
void main()
{
    clrscr();
    int a,b,c;
    cout<<"Enter one numbers: ";
    cin>>a;
    cout<<"Enter second number: ";
    cin>>b;
    swap(a,b);
    cout<<a<<" "<<b;
    getch();
}
void swap(int &a,int &b)
{
    int c;
    c=a;
    a=b;
    b=c;
}