C Programming - Pointers - Discussion

Discussion Forum : Pointers - General Questions (Q.No. 3)

Pointers

In which header file is the NULL macro defined?

stdio.h

stddef.h

stdio.h and stddef.h

math.h

Answer: Option

Explanation:

The macro "NULL" is defined in locale.h, stddef.h, stdio.h, stdlib.h, string.h, time.h, and wchar.h.

Discussion:

48 comments Page 3 of 5.

Rashmi said: 9 years ago

Please explain locale.h header file. What does it contain?

Sanu said: 1 decade ago

Macro is single line abbreviation for group of statement.

Pokar sanjay said: 1 decade ago

I can not understand about stddef.h can anyone explain?

Pradeep said: 1 decade ago

I want exact information & use of this function.

Karthika said: 1 decade ago

I need the purpose of using wchar.h in this program.

Vanitha said: 1 decade ago

If it necessary to include both the header files?

Zoaib said: 1 decade ago

Hi please tell about the stdio.h and stdio.lib ?

Harsh said: 1 decade ago

Please tell me What kind of standard definition?

Akshay Kalra said: 7 years ago

NULL is defined as:

#define NULL (void *)0

Vinod said: 1 decade ago

What is the purpose of using null pointer?

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