What is forward declaration in C?

Forward declaration is a promise to define something that you make to a compiler at the point where the definition cannot be made. The compiler can use your word to interpret other declarations that it would not be able to interpret otherwise.

Can you forward declare a function?

A forward declaration allows us to tell the compiler about the existence of an identifier before actually defining the identifier. In the case of functions, this allows us to tell the compiler about the existence of a function before we define the function’s body.

What is function declaration syntax?

A function declaration tells the compiler about a function name and how to call the function. The actual body of the function can be defined separately. A function declaration has the following parts − return_type function_name( parameter list );

How a function is declared in C?

In C and C++, functions must be declared before the are used. You can declare a function by providing its return value, name, and the types for its arguments. The names of the arguments are optional. A function definition counts as a function declaration.

What is forward function?

Forwarding is used in a number of design patterns, where some members are forwarded to another object, while others are handled by the directly used object. The forwarding object is frequently called a wrapper object, and explicit forwarding members are called wrapper functions.

What is forward declaration in Objective C?

Forward declarations are mainly to avoid circular imports, where one file imports another file which imports the first file etc. Basically when you import a file, contents of the file are substituted at the point of import when you build your project, which is then fed to the compiler.

Does C support forward declaration?

In Objective-C, classes and protocols can be forward-declared if you only need to use them as part of an object pointer type, e.g. MyClass * or id.

What is the correct format for declaration of function in C?

Discussion Forum

Que. Which of the following is a correct format for declaration of function?
b. return-type function-name(argument type) {}
c. return-type (argument type)function-name;
d. all of the mentioned
Answer:return-type function-name(argument type);

What is the correct format for declaration of function?

Correct Option: C return-type function-name(argument type);

What is meant by forward declaration?

In computer programming, a forward declaration is a declaration of an identifier (denoting an entity such as a type, a variable, a constant, or a function) for which the programmer has not yet given a complete definition.