Explain the #undef directive, C/C++ Programming

Assignment Help:

The #undef Directive

This directive undefines a previously explained macro. For, example the following will give an error since PI is undefined.

#define PI 3.14285

void main()

{

cout<< PI; // no error here

# undef PI;

cout << PI; // error after undef.

}

Related Discussions:- Explain the #undef directive

Program for game of war, Objective of this Program: (a) To learn more ab...

Objective of this Program: (a) To learn more about modularization of a program into independent modules, (b) To use arrays in a program, (c) To get some experience with us

Overloading binary operators using friend function, Overloading Binary Oper...

Overloading Binary Operators Using Friend Function class SI {float i,p,n,r,a; public: SI(){}; SI(int gp,int gn, int gr); void putdata(void); friend SI operato

Explain some string oriented library functions, Explain some String Oriente...

Explain some String Oriented Library Functions? To make simpler string processing we can use special string oriented library functions. Mainly the C compilers include library f

Selection sort - c program, Selection sort - C program: Write a progra...

Selection sort - C program: Write a program to define a selection sort. void main() { clrscr(); int a[100],ch,n; cout cin>>n; for (int i=0;i

Luminous Jewels - The Polishing Game, program

program

Roman code python help , In general, Roman numerals can be converted mathem...

In general, Roman numerals can be converted mathematically by simply assigning a numerical value to each letter, according to the chart below, and calculating a total: M=1000 | D=5

Create a c project, The project will include Arena models (only .doe files)...

The project will include Arena models (only .doe files) and MSWord document for the report. Thereport must contain the following sections: 1. Introduction: (a) Statemen

Explain call by reference, Call by Reference Passing variables(paramete...

Call by Reference Passing variables(parameters) to a function in C can be done in two ways - pass by value, also called as call by value and pass by address or also known as ca

Create cpp code for identify objects and their relationships, You are setti...

You are setting up an information system for a DVD Rental Company called Box office. The new system need to hold information about customers and DVDs rentals, payments and fines. C

Required audio expert in c# - create audio engine, Project Description: ...

Project Description: We want an EXPERT CODER to help us create an 'audio engine' in C#. We want to be able to specify an input of a wave/MP3 file, and have the engine manipul

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages