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

Explain syntax rules for writing constructor functions, Syntax rules for wr...

Syntax rules for writing constructor functions Its name must be similar as that of the class to which it belongs. It is declared with no return type (not even void). Ho

Poker room auto seat program, Poker Room auto seat program Project Descr...

Poker Room auto seat program Project Description: I want a script for an online poker site. It requires to be scanning all the available tables and when the table meets certa

#title.digital clock, Write a program to print a digital clock which displa...

Write a program to print a digital clock which displays the time for 2 hours .

Bouncing Ball, Create an applet that bounces a blue ball inside an applet u...

Create an applet that bounces a blue ball inside an applet using Thread. The ball (diameter is 10) will start at position (0,0). When the ball hits the edge of the applet, the ba

Area Under Curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Create a mathematical number guessing game, Create a mathematical number gu...

Create a mathematical number guessing game. Have the user prompt for the number of games that they want to play. Then each game consists of the following rules. a. The computer

What does it mean to declare a member function as a virtual, What does it m...

What does it mean to declare a 1.      member function as a virtual A: (a) C++ virtual function is member function of any class, whose functionality may be over- ridden in

Develop a biomedical imaging project, Develop a biomedical imaging project ...

Develop a biomedical imaging project Project Description: This is a biomedical imaging project. Skills required are C++ Programming, Cocoa, Mac OS, Objective C

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd