Programming in C++, 2nd Edition

206 Functions in C++

prototype declaration statement is always terminated with semicolon. The statements given below

are the examples of function prototypes.

(A) void show (void);

(B) float sum (float, int);

(C)

float sum (float x, int y);

In example (A) the return type is void, that is the function does not return any value. The void

functions are always without return statement. The void argument, that is the function, does not

require any argument. By default, every function returns an integer value. To return a non-integer

value, the data type should be mentioned in function prototype and definition. While writing

definition of function, the return ...