swap two variable a , b

Question

#include<iostream>
using namespace std;
int main()
{
int a, b;
cout<<"Enter n. to A and B"<<"\n";
cin>>a>>b;
cout<<"\n"<<"Before Value"<<"\n"<<"A="<<a<<"\n"<<"B="<<b;
a+=b;
b=a-b;
a-=b;
cout<<"\n"<<"After Value"<<"\n"<<"A="<<a<<"\n"<<"B="<<b;
return 0;
}

Answer 1

jst edit one line, where you write a=b .. instead of a=b there is b=a... try it... almost all things are correct..

Answer 2

a+=b;
b=a - b;
a-=b;

Answer 3

okay..

Answer 4

yury d, very nice formula... thanks a lots

Answer 5

np

Answer 6

jst edit one line, where you write a=b .. instead of a=b there is b=a... try it... almost all things are correct..