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

Algorthrithm for c programe, Need algorithm for c programe #Minimum 100 wor...

Need algorithm for c programe #Minimum 100 words accepted#

3n+1, Consider the following algorithm to generate a sequence of numbers. S...

Consider the following algorithm to generate a sequence of numbers. Start with an integer n. If n is even, divide by 2. If n is odd, multiply by 3 and add 1. Repeat this process wi

Advance in c, create a program to populate the first array then the odd num...

create a program to populate the first array then the odd number is the second array and get the sum of the second array.

Define a structure in c++, Define a structure in C++: Write a program ...

Define a structure in C++: Write a program a structure in c++ program. void main() { struct player { char name[2

Type cast operator, What is T y pe C a s t Op er a t o r :...

What is T y pe C a s t Op er a t o r : T h e f l o a t c a n b e c o n v e r t e d t o i n t e g e r v a l u

Char, how many bytes required to char

how many bytes required to char

Programming and solving problems, One person who is specialist at programmi...

One person who is specialist at programming and solving problems with a computer Project Description: Dear Potential computer, hardware, programming and software genius, I

Decoding the messages, 6999066263304447777077766622337778 -----> message se...

6999066263304447777077766622337778 -----> message sent by the first smuggler. my name is robert---------> message decoded by the second smuggler. Where ‘0’ denotes the "space".

Nonlinear least squares minimization, Estimation of the yield curve using n...

Estimation of the yield curve using nonlinear least squares minimization: The last part of this assignment asks you to construct the Nelson Siegel yield curve from observed bond pr

FlipFlaps fltk project, The project is to design and write a C++11/FLTKgame...

The project is to design and write a C++11/FLTKgame program with a graphical user interface.The game is based on "pancake sorting," as described at http://en.wikipedia.org/wiki/P

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages