ASCII Chart
Min standard notice:
The following chart contains all 128 ASCII decimal (dec), octal (oct), hexadecimal (hex) and character (ch) codes.
# Example
#include <iostream>
int main()
{
std::cout << "Printable ASCII [32..126]:\n";
for (char c{' '}; c <= '~'; ++c)
std::cout << c << ((c + 1) % 32 ? ' ' : '\n');
std::cout << '\n';
}