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

Padovan string , .write a program that counts the number of occurrences of ...

.write a program that counts the number of occurrences of the string in the n-th padovan string p(n)   program in java // aakash , suraj , prem sasi kumar kamaraj college

Dynamic initialization of objects and dynamic constructor, Dynamic Initiali...

Dynamic Initialization of objects: It is initializing the objects by passing the valued to the constructor from the user input or other means.   Through cin operator a value

Calculating interest, The interest charged on a loan banking facility is ca...

The interest charged on a loan banking facility is calculated based on principal amount, rate and time. implement a C program that can be used to automate the calculation of the in

Minimum total number of shelv, Write a program that finds the minimum total...

Write a program that finds the minimum total number of shelv, C/C++ Programming

Procedure to compute recursive and iterative process, Consider the followin...

Consider the following mathematical function: (a) Write a procedure that computes f by means of a recursive process (b) Write a procedure that computes f by means of an

Software crisis, defining software crisis As the technology changes ra...

defining software crisis As the technology changes rapidly the requirement for the users' change, to part the growing demand of the user for trade,  business, and personal

Palindrome, string S convert it to a palindrome by doing chara, C/C++ Progr...

string S convert it to a palindrome by doing chara, C/C++ Programming

Compute the average of five numbers, Step 1 Define the program headers and ...

Step 1 Define the program headers and the variables      #include   #include   #include   #include void main()   {       char prompt;     float a,b,c,d,e;     floa

COMPILER DESIGN, Compiler Design - Limit In The Method Instructions

Compiler Design - Limit In The Method Instructions

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