Tutorial: C and Cpp Miscellaneous Basic C++ Functions Tutorial
We have looked at one function already - the ?main? function. Functions are bits of code that the program jumps to in order to do certain tasks. The main function holds the main code (the code that is executed first) and where the other functions are call
Tutorial Details:
Basic C++ Functions
We have looked at one function already - the “ main ” function. Functions are bits of code that the program jumps to in order to do certain tasks. The main function holds the main code (the code that is executed first) and where the other functions are called from. Variables can be passed into and returned from a function.
You can think of functions like the different functions of a calculator. The calculator holds the variables the human inputs and decides what to do with them depending on what the human presses. The calculator calls the appropriate function (in this case we will call it add) and gives the add function the variables the human has given it. The add function then returns the added together variables, and the main code (Calculator) then displays the Variable.
The main code needs no knowledge of how the function works just what the function does. Lets have a go at programming a simple calculator.
First we need to be able to use the “ cout ” and “ cin ” commands:
#include
When we use a function we must tell the compiler that the function exists before the main code is run. We do this through a function prototype, which is declared like a variable.
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