swap in cpp

1int a{}, b{}, temp{};
2cin >> a >> b;
3
4  //===================== METHOD-1
5   temp = a;
6   a = b;
7   b = temp;
8
9  //===================== METHOD-2 ( XOR ^ )
10  // example: a^b =  5^7
11   a = a ^ b;   // 5^7
12   b = a ^ b;   // 5 ^ 7 ^ 7  //5 ( 7 & 7 dismissed)
13   a = a ^ b;   // 5 ^ 7 ^ 5  //7 ( 5 & 5 dismissed)
14
15  //===================== METHOD-3  ( swap() )
16  swap(a, b);
17
18  cout << "a " << a << endl;
19  cout << "b " << b << endl;
20

1Return Value: The function does not return anything, it swaps the values of the two variables

1int main()
2{
3	int a = 5;
4	int b = 10;
5  
6	swap(a, b);
7  
8	cout << "a = " << a << endl;
9	cout << "b = " << b << endl;
10}