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

Define the logical operators in c language, Define the Logical Operators in...

Define the Logical Operators in c language? The Logical operators deals with the ways the relationships are able to connected. C has the following three logical operators

Find area, #question.to determine the area of a triangle,rectangle and tra...

#question.to determine the area of a triangle,rectangle and trapezium

Program that predicts users age, Program: Write a program that predicts...

Program: Write a program that predicts users' age (0-128 years old) with at most 7 questions. The game starts with asking the user whether he/she is younger or older than G (an

C CODING, HOW THE C PROGRAM CODING IMPLEMENTED DY ITSELF UNDERSTANDING . AL...

HOW THE C PROGRAM CODING IMPLEMENTED DY ITSELF UNDERSTANDING . ALSO HOW I CAN A BECOME A GOOD PROGRAMMER IN C WHAT I DO FOR GOOD PROGRAMMING ,TELL ME HOW C CODING DEVELOP DY ITSELF

Caesar cipher, This task involves char arrays and pointer based string hand...

This task involves char arrays and pointer based string handling. Which we use to make a simple encryption program, using a Caesar Cipher, Write a program that: a. Asks

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

Write a program that finds the minimum total number of shelves, including the initial one required for this loading process.

Sentence, Consider text comprised of sentences and sentences comprised of w...

Consider text comprised of sentences and sentences comprised of words. Words in a sentence will be space delimited. Given a text and K strings, task is to find out the number valid

Area under curve, write a program to find the area under the curve y=f(x) b...

write a program to find the area under the curve y=f(x) between x=a and x=b integrate y=f(x)   #include float start_point, /* GLOBAL VARIABLES */

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