The reason for this is simple: malloc returns void* and not int*.While in C it's legal to assign void* to int* without a cast, in C++ it isn't.. Why the difference? See also. A void pointer in C is a pointer that does not have any associated data type. A void pointer in C clearly indicates that it is empty and can only capable of holding the addresses of any type. Following is the declaration for memchr() function. Further, these void pointers with addresses can be typecast into any other type easily. Definition of C Void Pointer. Void functions are mostly used in two classes of functions. while creating methods we mention whether a method has to return something after executing the block of code enclosed in it or not (Void). Declaration. Well, let us start with C. The official "bible" of C, "The C Programming Language, 2nd edition" by Kernighan and Ritchie states in section A.6.8: Any pointer to an object may be converted to type void* without loss of information. void Write () Program presents an example where a void function is defined to display a message. The C library function void *memchr(const void *str, int c, size_t n) searches for the first occurrence of the character c (an unsigned char) in the first n bytes of the string pointed to, by the argument str. One should stop using the ‘void main’ if doing so. If a function is defined as “ void ” it does not need to return a value. The first is a function that prints information for the user to read. C# reference; System.Void For example (for our purposes), the printf function is treated as a void function. You cannot use void as the type of a variable. You will learn more about return values later in this chapter You will learn more about return values later in this chapter Note: In C#, it is good practice to start with an uppercase letter when naming methods, as it makes the code easier to read. Functions 2: Void (NonValue-Returning) Functions. Since we haven’t covered what a pointer is … void means that this method does not have a return value. Using the return statement in void functions Note that in the example above we didn’t need to use the return statement in the main function. One should stop using the ‘void … Home » C » Pointer » Void Functions in C. ... ("You need a compiler for learning C language.\n"); } The first line in the above definition may also be written as. You can also use void as a referent type to declare a pointer to an unknown type. void main – The ANSI standard says "no" to the ‘void main’ and thus using it can be considered wrong. In lieu of a data type, void functions use the keyword "void." 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