[Dev-C++] string conversion to integer

[Alan T. <ala...@3n...>]

        I thought I knew how to convert string objects to integer.  I
thought a character (e.g., input_string[2] of object string input_string)
could be referenced in a string and converted using the C ASCII-to-integer
function atoi.  However, the compiler doesn`t like that and apparently does
not see an element of a string array as a character.

            How do you do this?                Thanks, Alan