C++ Program that reads in lower case letters and outputs the upper case letter

I am trying to write a program that asks the user to input a lowercase letter. The program should print out the uppercase version of the letter.

But I'm not allowed to have any if-statements or conditional logic in the code.

This is what I have so far:

#include iostream>

using namespace std;

int main() {

char lowerCase, upperCase;

cout << "Enter a lower case letter:" << endl;

cin >> lowerCase;

return 0;

}

Example Output: Enter a lower case letter: r

Upper case: R