No match for 'operator==' in a simple string code

Question

Writing a simple code and ran into a problem I\'m not sure how to deal with. I tried looking into it with a search but nothing I found was much help and everyone\'s answers wer

Answer 1

lastTwoChars is a string. You must compare it to a string, or at least a const char * or const char[].

The expression lastTwoChars == 41 compares lastTwoChars to 41--an int. This is not defined behavior for a string.

Instead, put 41 in quotes to make it a const char[] (specifically const char[3]):

 if (lastTwoChars == "41")

It looks like you do this several times in your code.