HOW TO SWAP TWO NUMBER ?

#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int a = 10, b= 20, temp;

cout<<"Before Swapping"<<endl<<a<<"\t"<<b<<endl<<endl;

temp=a;
a=b;
b=temp;

cout<<"After Swapping"<<endl<<a<<"\t"<<b<<endl<<endl;

getch();
}

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