INST 201 Lecture Notes - Lecture 5: Include Directive, C Mathematical Functions, Global Variable
3 Feb 2018
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Inst201 lecture 5: member class definitions: member function definitions-- classes usually contain functions, most of which will be defined outside of the actual class definition. You may also define them at this point, but most functions are simply declared; that is, without coding the body of the function. This is where it all starts: function definitions-- it is your choice whether or not to define your functions when you declare them. Usually, functions longer than 1 or 2 lines are defined below main() for easier readability. The #include statement tells the c++ preprocessor to insert the definitions of variables, classes, and functions into the current file. #include , for example, lets you use the cout and cin functions, and #include lets you use extra functions like the square root function sqrt(). To #include files that are not standard with c++ (files you define yourself, for instance) you use quotation marks instead of angle brackets.
