what meaning of null and void

Profound analysis of void and void pointer meaning, void pointer ParsingRules for using the void Keyword:1. If the function does not return a value, the void type should be declared;2. If the function has no parameters, the void parameter should be

The meaning of void Void is "no type" and void * is "no type pointer" and can point to any data type.void specification for use of pointersThe ①void pointer can point to any type of data, that is, the null pointer is assigned to a pointer of

The meaning of voidVoid is "no type" and void * is "no type pointer" and can point to any data type. void pointer Usage specificationA ①void pointer can point to any type of data, that is, an assignment to a void pointer using a pointer to any data

This article and we share the main is the C language null pointer null and void pointers related content, together look at it, hope to learn C language to help you.empty pointer nullA pointer variable can point to any piece of memory on the computer,

Empty pointer nullin the C language, if a pointer does not point to any data, we call itNULL pointer, withNULLrepresentation. For example:int *p = NULL; note Case-sensitive, NULL does not have any special meaning, just an ordinary identifier.

The MySQL database is an open source database based on structured data. The SQL statement is the core language in the MySQL database. However, there are two pitfalls to take care of when executing SQL statements in a MySQL database.Trap one: null

Rules for using the Void keyword:1. If the function does not return a value, it should be declared as void type;2. If the function has no arguments, declare that its argument is void;3. If the function parameter can be any type of pointer, then

Rules for using the Void keyword:1. If the function does not return a value, it should be declared as void type;2. If the function has no arguments, declare that its argument is void;3. If the function parameter can be any type of pointer, then

Author: gnuhpcSource: http://www.cnblogs.com/gnuhpc/ Void main_thread (void * PTR){Char * message1 = "thread 1 ";Char * message2 = "thread 2 ";Pthread_t thread3, thread4;Int iret3, iret4;Iret3 = pthread_create (& thread3, null, (void *) &

(i) the meaning of voidVoid literally means "no type", and void is almost only "annotated" and restricts the function of the program, since no one will ever define a void variable, let's try to define:void A;This line of statement compiles with an