Sample program which draws an arithmetic operation to the terminal

Output (and input) example:

Left operand: 23
Right operand: 15
Operator (+, -, *, /, %): +
Char to display: #
Size of text: 5
Space between digits: 1
      ##### #####
          #     #
      ##### #####
      #         #
      ##### #####

        #   #####
  +    ##   #
+++++   #   #####
  +     #       #
      ##### #####

__________________

      ##### #####
          # #   #
      ##### #####
          # #   #
      ##### #####