The following code example is taken from the book
 
  Object-Oriented Programming in C++
 by Nicolai M. Josuttis, Wiley, 2002
 
  © Copyright Nicolai M. Josuttis 2002
/* output character set
 */
#include <iostream>    // declarations for I/O
int main()
{
    // for every character c with a value of 32 to 126
    for (unsigned char c=32; c<127; ++c) {
        // output value as number and as character:
        std::cout << "Value: " << static_cast<int>(c)
                  << " Character: " << c
                  << std::endl;
    }
}