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 the break statement, The break statement The break statement, w...

The break statement The break statement, which was already covered in the switch.. case, can also be used in the loops. When a loop statement is encountered in the loops the co

TCP, check this link: http://cactus.eas.asu.edu/partha/Teaching/430.2013/...

check this link: http://cactus.eas.asu.edu/partha/Teaching/430.2013/Project/proj-2.2013.htm

Can you think of a condition where your program would crash , Can you think...

Can you think of a condition where your program would crash without attaining the breakpoint that you set at the starting of main()? A: C++ let for dynamic initialization of glo

Miss, Depreciation to a salvage value of 0. For tax purposes an item m...

Depreciation to a salvage value of 0. For tax purposes an item may be depreciated over a period of several years, n. With the straight line method of depreciati

Program to sort a range of numbers with insertion, Program to sort a range ...

Program to sort a range of numbers with Insertion: /* define variable */ const int max=29000; int list[max]; FILE *fp; clock_t start,end; char any1[8];

Mobile problem, program that decodes sending smuggler''s string

program that decodes sending smuggler''s string

Program, write a program that adds all numbers from 1 to 200

write a program that adds all numbers from 1 to 200

Online Tutor Available, I am an online tutor who can teach computer science...

I am an online tutor who can teach computer science and programming language. Is there any requirement for this?

Pointer, solution of problem based on poiter

solution of problem based on poiter

Explain string constants in c language - escape sequences, Explain string c...

Explain string constants in c language - Escape Sequences? Illustrations are "945", "hello", "well done", "5+3". The character constant (example 'x') isn't equivalent to the st

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