Chapter 36 User-Defined Subprograms
36.1 Subprograms that Return a Value
In C++ and many other computer languages, a subprogram that returns a value is called a function. There are two categories of functions. There are the built-in functions, such as abs(), and there are the user-defined functions, those that you can personally write and use in your own programs.
The general form of a C++ function that returns a value is shown here.
return_type name([type1 arg1, type2 arg2, type3 arg3, …]) {
Local variables declaration section
A statement or block of statements
return value;
}
where
►return_type is the data type of the value that the function returns.
►name is the name of the function.
►arg1, arg2, arg3, … is a list of arguments (variables, ...
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