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

Assigment, C++ Programming Assignment ATM Machine Phase 1 In this assign...

C++ Programming Assignment ATM Machine Phase 1 In this assignment you will create a program that allows a user to do the following: 1) Create a bank account by supplying a use

Program for implement vectors and iterators, - Write a program using vector...

- Write a program using vectors and iterators that allows a user to maintain a personal list of DVD titles. The user should be able to view all DVD titles in his library, add and d

Iteration problem, my program does not run more than 9 iterations when ever...

my program does not run more than 9 iterations when ever i want to iterate more than 100 iterations. what is the reason and how to tackle?

AREAS, Write a program to find the area under the curve y = f(x) between 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

C program to define power of a function, C program to define power of a fun...

C program to define power of a function: Write a program to use power of a function. void main() { int x,y,po=1,i,j; clrscr();   printf("Give x,y\n"); sca

What is a template in c++, Templates permit to create generic functions tha...

Templates permit to create generic functions that admit any data type as parameters and return value without having to overload the function with all the possible data types. Until

PADOVAN STRING, # c pragram TO count the number of occurances of the string...

# c pragram TO count the number of occurances of the string in nth padovan''s string program in java // aakash , suraj , prem sasi kumar kamaraj college program 1 : pa

Car rental system, complex coding with structure and file handling

complex coding with structure and file handling

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