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

#title., A student apears in exam of math, physics, and chemistry. Write a...

A student apears in exam of math, physics, and chemistry. Write a program to find the total marks aa student has aqueired find the average.

Create program to prints out the value of a variable, Here is a short progr...

Here is a short program. It prints out the value of a variable "x". Ernie and Bert disagree about what will be printed: Ernie says, the value gets changed in "changeX" so it will p

Custom scans and alerts think or swim, Custom Scans and Alerts Think or Swi...

Custom Scans and Alerts Think or Swim Project Description: I am seeking somebody to make me several Custom Scans and Alerts on Thinkorswim TOS Skills required are C++ Prog

Data structures, what are 3 conditions under which the sequential search of...

what are 3 conditions under which the sequential search of a list is preferable to binary search?

Pebble merchant, having 2 arrays and 3killograms of pebbles are needed conv...

having 2 arrays and 3killograms of pebbles are needed converting an area of 1 square meter the rate of pebble is $5 per killograms

Encoding and decoding, program for decode the encoded numbering format into...

program for decode the encoded numbering format into message

#calculate percentge, #write a multilevel c++ program to take marks of 3 su...

#write a multilevel c++ program to take marks of 3 subjects and calculate percentage and display it

How private instance of a class can be assigned values, Question 1: (a)...

Question 1: (a) Explain clearly the following concepts using suitable examples of your own:- (i) concrete class v/s abstract class (ii) constructor v/s over

C program for removing char which u want, C Program for REMOVING CHAR WHICH...

C Program for REMOVING CHAR WHICH U WANT void main() { int i,j; char a[100],r; clrscr(); for(i=0;i

Compiler related, Please give me a programming code of first & follow wit...

Please give me a programming code of first & follow with c or c++ laqnguage .When anyone give me the programming code of first & follow please explain every lines with the help

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages