Interchanging two variables without using third variable

#include<iostream>
using namespace std;
int main()
{
int var1,var2;
cout<<“Enter value of two variablesn”;
cin>>var1>>var2;
var1=var1+var2;
var2=var1-var2;
var1=var1-var2;
cout<<“Values after interchangingn”;
cout<<var1<<” “<<var2<<“n”;
}

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