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

C programming., #queComputers are frequently used in check-writing systems,...

#queComputers are frequently used in check-writing systems, such as payroll and accounts payable applications. Many stories circulate regarding weekly pay- checks being printed (by

Compute the net pay for employees - c program, Write a C# program to comput...

Write a C# program to compute the Net Pay for employees. The program is to have a Main method and two user-defined methods. The Main method is to input the employee's name (string)

Minimum shelf, #At a shop of marbles, packs of marbles are prepared. Packet...

#At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with the

Programming Assignment 4, For this program, you are going to modify your pr...

For this program, you are going to modify your previous program (program 3) so that it will now have a menu to see if the user wants to read the input from a file or interactively.

Is there anything you can do in c++ which you cannot do in c, A: No. There ...

A: No. There is nothing you can do in C++ which you cannot do in C. In spite of everything

Class, array of class objects and single inheritance

array of class objects and single inheritance

Super ASCII string cost, string will contain only lower case alphabet& the ...

string will contain only lower case alphabet& the ascii value starts from 1-26,(ie,a=1&z=26).it perform the operation like the following costs:add=2units,replace=1unit,delete=3unit

Determine the types of container class, Determine the types of Container cl...

Determine the types of Container class Container class can be of 2 types: - Heterogeneous container - Here container class comprise a group of mixed objects - Homogeneou

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