(C++)Can I use the same identifie for the return variable of a function and the variable in the main program where it's stored?

Question

For example:

int sum(int A, int B)
{
int SUM;
SUM=A+B:
return SUM;
}

main()
{
int N1, N2, SUM;
cin >> N1;
cin >> N2;
SUM = sum(N1, N2);
cout << "\n" << sum << "\n";
system("pause");
}

I used the "SUM" variable either in the function and in the main program, is it ok?

Answer 1

yes