what does this mean

Question

 error C2065: 'total' : undeclared identifier

Answer 1

It means that somewhere you're using 'total' (as a variable probably) but you haven't declared it anywhere. Variables, functions, classes etc. need to be declared before they are used.

Answer 2

 error C2065: 'total' : undeclared identifier

Note that the error message usually tells you which file (.cpp, .h, etc.) the error
occurred in and which line number it is on. If compiling in the IDE (rather than
from the command line) double-clicking on the error message in the Error window
should take you directly to that line in your source code.

- Wayne