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

Boardcoloring, how to fill the blank spaces in the board of 4*4 matrix with...

how to fill the blank spaces in the board of 4*4 matrix with the minimum of 4 colors and the condition is the adjacent element should not have the same colour

C program, Write a ‘C’ program to accept any 3 digit integer number from th...

Write a ‘C’ program to accept any 3 digit integer number from the keyboard and display the word equivalent representation of the given number.

C program for function of copy one string in other string, C Program for FU...

C Program for FUNCTION OF COPY ONE STRING IN OTHER STRING #include stdio.h> #include conio.h> int copy(char a[],char b[]); void main() {           char a[100],b[

Using only arrays, write c program to do the following : -fill 2 dimensiona...

write c program to do the following : -fill 2 dimensional array (square matrix array with size=4). -ask the user to enter any integer number and add this number to the diagonals -o

Define statements to define the constants, the problem description. The ...

the problem description. The order of the C Program should be as follows: Variables and constants Use #define statements to define the constants. Use arr

Logic families and lsi devices, We have used logic symbols in the past, but...

We have used logic symbols in the past, but not really though about the actual real devices. Semiconductor companies have taken the logic symbols are manufactured them into logic f

Program to ask date & days added to produce -c++ program, THIS PROGRAM IS T...

THIS PROGRAM IS TO ASK A DATE & ALSO ASK FOR DAYS TO BE ADDED TO PRODUCE #include #include struct date  {   int dd;   int yy;   int mm;  }; void main()  {  clrscr();  in

Rfid call to filmmaker pro database, Project Description: I want an expe...

Project Description: I want an experienced programmer to program an RFID tag that will be read (maybe also written), and perform a call to a Filmmaker Pro 13 database. Skills

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