Program Logic Steps:
Store sum of both in var1.
Subtract var2 from var1 and store it in var2 (now var2 has value of var1) .
Subtract var2 from var1 and store it in var1 (now var1 has value of var2).
C++ Program
#include<iostream> using namespace std; int main() { int var1, var2; cout<<"Enter value for first integer: "; cin>>var1; cout<<"Enter value for second integer: "; cin>>var2; cout<<" Values Before swapping: "<<endl; cout<<"First Integer ="<<var1<<endl; cout<<"Second Interger ="<<var2<<endl; var1=var1+var2; var2=var1-var2; var1=var1-var2; cout<<" Values After swapping: "<<endl; cout<<"First Integer ="<<var1<<endl; cout<<"Second Interger ="<<var2<<endl; return 0; }