c 2b 2b generate a random letter

1#include <iostream>
2
3int main() {
4    srand(time(0));
5    std::cout <<"random uppercase = " << char('A' + rand() % 26) << std::endl;
6    // or
7    std::cout <<"random uppercase = " << char('a' + rand() % 26) << std::endl;
8}