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 some features of static storage class in c program, Define some feat...

Define some features of static storage class in c program? The features of a variable defined to contain a static storage class are as follows. Storage - memory Default

How can one encourage his (older) compiler , Q: How can one encourage his (...

Q: How can one encourage his (older) compiler to check new to see automatically if it returns NULL?       A: His compiler eventually will. If he contain an old compiler wh

ASCII, A string S is said to be "Super ASCII", if it contains the character...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

Minimum shelves, write a c++ program, that finds the minimum total number o...

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

Operator overloading - c++ program, Operator overloading - c++ program: ...

Operator overloading - c++ program: Write a program in c to define operator overloading. class matrix{                   private :                 int x[2][2];

C program to construct a structure , c program to construct a structure: ...

c program to construct a structure: struct sensus                 {                                 char name[30];                                 long int population;

write a scheme procedure to evaluate expression, (a) Write a Scheme proced...

(a) Write a Scheme procedure to evaluate the expression: 7/6+2*5+(3*2+6*7)*4. (b) Write a Scheme procedure to evaluate the expression: 2*(-1+(-3+4*2-7)*3/(3*2)).

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