What is function calling in c plus plus?

Answer 1

Function calling is where your code branches off to execute a function and then returns to the instruction following the call. The function may also return a value that can be stored and/or processed by the code that called it. Functions allow common code to be separated from the code that uses the common code, thus reducing maintenance (the code in the function is written once, rather than every time it is required).

Answer 2

You give the name of the function and any parameters it require. For example, if I have a function named test which accepts 3 integer parameters, I can do:

test(1, 2, 3);

Another example is if I want to use an object's function. If I have an object named testObject which has a function testFunction, I can do:

testObject.testFunction();

If I have a pointer testPointer pointing to testObject, I can do:

testPointer->testFunction();