#include <iostream>

int main( void )
{
    char letter = 'A';    /* 'A' is character constant */
    int num     = letter;
    char ch1    = 'b';    /* ASCII code = 98 */
    char ch2    = 'B';    /* ASCII code = 66 */

    std::cout << "letter = " << letter << ", num = " << num << '\n';
    std::cout << "letter + 1 = " << letter + 1 << ", num = " << num << '\n';
    std::cout << ch1 << " - " << ch2 << " = " << ch1 - ch2 << '\n';
}