Function: One of the building blocks of C++ program is functions; it contains a group of statements which are used to perform a specific task and the executable segments in a program. The function “main()” is most import function in a program, because the “main()” function is the starting point of the program. The main advantage of using function is reusability of code and reduces the size of the program, because a function can be called for multiple numbers of times. Function objects: An object which is created for a class which overloads the function call operator is referred as function object. It resembles like a function and it can be passed as parameter to other functions. It is also known as “functor”. It can accept arguments and return values. Function object can be created when the class overloads the parenthesis “()” operator which is referred as “function call operator”.

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Chapter 17, Problem 17RQE

Program Plan Intro

Function:

One of the building blocks of C++ program is functions; it contains a group of statements which are used to perform a specific task and the executable segments in a program.

The function “main()” is most import function in a program, because the “main()” function is the starting point of the program.

The main advantage of using function is reusability of code and reduces the size of the program, because a function can be called for multiple numbers of times.

Function objects:

An object which is created for a class which overloads the function call operator is referred as function object.

It resembles like a function and it can be passed as parameter to other functions.

It is also known as “functor”.

It can accept arguments and return values.

Function object can be created when the class overloads the parenthesis “()” operator which is referred as “function call operator”.

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