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

Decode the code, c++ coding decode the letters from numbers

c++ coding decode the letters from numbers

Explain the ways of initializing the arrays, Various ways of initializing t...

Various ways of initializing the Arrays. - The for loop initializes 10 elements with the value of their index.      void main()     {                 const in

I need keylogger extension on chrome, Project Description: I want someon...

Project Description: I want someone to create and install a keylogger on a chrome browser. This could be a relatively simple job, please have experience with this type of work.

C program to convert number to binary, Write a program in C that you will n...

Write a program in C that you will name "divide.exe", to divide one 32-bit twos-complement binary number by another, giving the quotient and the remainder, using the subtract-shift

Reverse a string - c ++ program, Reverse a string - C ++ program: Writ...

Reverse a string - C ++ program: Write a program in c to reverse a string. int main() {     Stack theStack;     String reverse("reverse");       cout

Write a c program to input numbes in table format, Write a C program to inp...

Write a C program to input 16 numbers and print them out in a table format of 4 wide by 4 deep. E.g.   4    5    5    7   8    9    10    11   12    13    14    15   16    17

Explain logical operators, Logical Operators We say any expression that...

Logical Operators We say any expression that evaluates to zero is a FALSE logic condition and that evaluating to non-zero value is a TRUE condition. Logical operators are usefu

Padovan string, A Padovan string P(n) for a natural number n is defined as:...

A Padovan string P(n) for a natural number n is defined as: P(0) = ‘X’ P(1) = ‘Y’ P(2) = ‘Z’ P(n) = P(n-2) + P(n-3), n>2 where + denotes string concate

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