Swap using pointers

//Program to swap two numbers using function and pointers.
#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;
}