What is default value of formal arguments?

What parameter to a function is one for which an automatic value is supplied if do not explicitly use one in C programming?

You are referring to default arguments. However, C does not support default arguments. That's a C++ feature.

What are the formal arguments?

Formal arguments are the named arguments defined by the function. Actual arguments are those arguments that were passed to the function by the caller.

How is the default constructor equivalent to a constructor having default arguments?

Any constructor that can be invoked without explicitly passing any arguments is a default constructor. Note that there can be only one default constructor so there can only be one constructor where all arguments have default values or one constructor that has no arguments, but not both. A constructor where all arguments have default values is a useful means of combining two or more constructors into a single default constructor, thus reducing verbosity and code duplication.

What are default arguments in c?

Nothing.

What is (void)0?

A default argument is a function argument that has a default value. That is, if no value is specified for the argument, the default value is used. Only the trailing arguments of a function can be default arguments. That is, if an argument has a default value, all arguments that follow it must also have a default value: // declarations: void f (int=42); // ok void g (int, int=42); // ok void h (int=42, int); // compiler error (trailing default argument missing) // calls: f (); // ok -- invokes f(42); f (0); // ok -- invokes f(0); g (0); // ok -- invokes g (0, 42); A default value cannot be repeated in a function's definition unless that definition is the only declaration: // declarations: void f (int=42); void g (int=42); // definitions: void f (int x) { /* ... */ }; // ok void g (int x=42) { /.../ }; // error void h (int x=42) { /* ... */ }; // ok

Why is the constructor of the Stack Linked List class empty?

The default constructor of a stack is empty because the default value of any container, including a linked list, is an empty container which requires no arguments (all members default to zero).

Sample program in c plus plus with parameter?

C++ doesn't have parameters it has arguments, both formal and actual. Actual arguments are the arguments you pass to a function. Formal arguments are the arguments used by the function and which are treated as local variables within the function body. Formal arguments always fall from scope when the function returns. In order for a function to make changes to the actual argument you you can either return the formal argument by value and assign the function to the actual argument upon return, or you can pass the argument by reference. In the former case, the returned value is temporary. If the function is not assigned to the actual argument, the temporary value falls from scope. In the latter case, the actual and formal arguments both refer to the same object through separate names (aliases). Thus any operations performed on the formal argument will affect the actual argument (they are one and the same object). Example: // Forward declarations. int byval (int); void byref (int&); int main() { int actual = 42; byval (actual); // The byval formal argument is no longer in scope. // Although a temporary value of 84 was returned, // it wasn't assigned to anything and is no longer // available. // The actual argument still has the value 42. actual = byval (actual); // The byval formal argument is no longer in scope, // however, its value was returned and assigned // to the actual argument. // The actual argument now has the value 84. byref (actual); // The formal argument and the actual argument are // one and the same argument. // The actual argument now has the value 42. } int byvalue(int formal) { formal *= 2; return formal; } // The formal argument no longer exists, but its value // was pushed into the function's return address. That // value will cease to exist unless the caller immediately // assigns the function's return value to a variable. void byref(int& formal) { formal /= 2; } // The formal argument no longer exists and nothing // was pushed onto the function's return address. // However, formal was just an alias for the actual // argument, thus the actual argument has already // been updated.

What do you mean by default arguments. How do you delare them?

Gand mrao

What is meant by arguments in c?

Arguments appear in functions and in function calls. Arguments passed to a function are known as actual arguments. The arguments used by the function are known as the formal arguments. In C, all arguments are passed by value, such that the formal argument is a copy of the actual argument.

Formal and Actual Arguments?

The actual arguments (we call them parameters) to a function are the original copies in the caller's address space. The function prolog code provided by the compiler provides for making copies of all of the parameters. These copies are called the formal parameters. In C and C++, the default calling convention is call by value, which means that the called function only has access to the formal copy. Optionally, you can call by reference, passing instead the address of the actual parameter. Using dereference notation, the called function then has access to the actual parameter, and the formal parameter is simply its address. One of the things that sometimes confuses people is the name of the parameter. You might, for instance, call something alpha in you main function. It is called alpha, and alpha means the memory location of alpha. In the function, however, you can call the parameter something else, perhaps beta. Within the context of the called function, beta contains the value of or the address of alpha, but it is not alpha, it is beta. To make matters worse, you can have another alpha within a block, or within the function, and that is certainly not related at all to the original alpha. Recommendation: Always call an object by consistent names. This way, you won't get into scoping rules trouble.

What is a default parameterized constructor?

There is no such thing as a default parameterized constructor. The default constructor is always the 'no-arg' constructor and does not take any parameters or arguments as input

What is default values of different primitive data types?

in integral data types default value=0 in decimal type default value is 0.0 in boolean default value is fa