C++ Code for sum of 4 numbers

#include <iostream>
using namespace std;

int main()
{
int num1, num2, num3, num4, sum;
cout << "Enter Four Numbers : \n";
cout << "a = ";
cin >> num1;
cout << "b = ";
cin >> num2;
cout << "c = ";
cin >> num3;
cout << "d = ";
cin >> num4;
sum = num1 + num2 + num3 + num4;
cout << "Sum Is  : " << sum << endl;



return 1;
}