Using - C++
        
 Source Code
        

        
            #include<iostream>
            using namespace std;

            class Swapper {
              public:
                void Swap(int *a, int *b);
            };
            
            void Swapper::Swap(int *a, int *b) {
                *a += *b;
                *b = *a - *b;
                *a = *a - *b;
            }
            
            int main() {
            int a, b;
            Swapper object;
              cout<< "Enter the value of a:  ";
              cin>> a;
              cout<< "Enter the value of b:  ";
              cin>> b;
              system("cls");
            
              cout<< "Before Swapping:  a = "<< a<< "  &  b = "<< b<< endl;
              object.Swap(&a,&b);
              cout<< "After Swapping :  a = "<< a<< "  &  b = "<< b<< endl;
            
              return 0;
            }
      

Enter the value of a:   100
Enter the value of b:   200 
-------------------------------------------------
Before Swapping:  a = 100   &   b = 200
After Swapping   :  a = 200   &   b = 100