What is parameters in C plus plus?

Answer 1

Parameters are the formal arguments of a function, as defined by the function. When you pass arguments to a function, those arguments are assigned to the function's parameters, either by value or by reference, depending on how the parameters are declared in the function. The following example explains both:

void foo( int param )

{

// param is a by value parameter, which is a copy of the argument passed to it.

}

void bar( int& param )

{

// param is a reference parameter, which references the argument passed to it.

}

int main()

{

int arg = 100;

foo( arg );

bar( arg );

return( 0 );

}

Note that passing a pointer is the same as passing an int by value: the pointer's value is passed to the function, not the pointer itself. To pass a pointer by reference, you must pass a pointer to pointer and the function's parameter must accept a pointer to pointer.

Answer 2

In C++, parameters are variables declared in the function's declaration and definition that receive values passed in from the function call. They are used to pass values or data into a function to be used within the function's code. Parameters allow functions to be more flexible and reusable by accepting different inputs without needing to modify the function's code.