A void pointer points to objects of any data type. This is a duplicate of a thousand other questions on the site network, among others @LarsViklund it is only a duplicate if there is a question on this site. In C, the code takes the form:Note that the parentheses that follow the function name are not optional in any case.The third use of void is a pointer declaration that equates to a pointer to something left unspecified, which is useful to programmers who write functions that store or pass pointers without using them. In C++, these function declarations are equivalent. By using our site, you acknowledge that you have read and understand our Software Engineering Stack Exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. You can also use void as a referent type to declare a pointer to an unknown type. Eventually, it must be cast to another pointer before it is dereferenced. A blank parameter list means "no parameters" the same as Thanks for contributing an answer to Software Engineering Stack Exchange! A void function uses a heading that names the function followed by a pair of parentheses. The void can also appear in the parameter list part of the code to indicate the function takes no actual parameters. The void function call is a stand-alone statement. Stack Exchange network consists of 177 Q&A communities including Parameters act as variables inside the method. The void function accomplishes its task and then returns control to the caller.

That means the compiler can actually tell you you've made a mistake if you try to pass something. Here we will learn to use void pointer as an argument with the character pointer (string) in C programming language.
Featured on Meta Learn more about Stack Overflow the company Parameters and Arguments. In C, a function with the parameter list (void) explicitly takes nothing for its arguments.

... You can add as many parameters as you want, just separate them with a comma: Syntax. David Bolton is a software developer who has worked for several major firms, including Morgan Stanley, PwC, BAE Systems, and LCH. Information can be passed to methods as parameter. A blank parameter list means "no parameters" the same as void does. C++ can take the empty parentheses, but C requires the word "void" in this usage. Some Interesting Facts: 1) void pointers cannot be dereferenced. Note that the above program compiles in C, but doesn’t compile in C++. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under
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It only takes a minute to sign up.I have heard that it is a good practice to write functions that do not receive anything as a parameter like this:But I hear that the right way to express that is like this:What is the difference between these two function declarations in both C and C++?As far as C is concerned, you should never use an empty identifier list in a function declaration In the case of C++, an empty parameter list in either a declaration or a definition indicates that the function takes no arguments, and is equivalent to using a parameter list of In C++, these function declarations are equivalent. Parameters act as variables inside the function. These parameters are used to send back a value (output), or both to send in and out values (input and output) from functions. Anybody can ask a question : void (*f)(int). Anybody can answer You can do this by declaring the parameter to by of type void *, and then casting the appropriate type in the function body, i.e. In C, the code takes the form: Learn more about hiring developers or posting ads with us 2) void pointers in C are used to implement generic functions in C. For example compare function which is used in qsort().