arguments 和pareameters的区别

在 ANSI/ISO C++ Professional Programmer's Handbook 中：

Arguments and Parameters
The words arguments and parameters are often used interchangeably in the literature, although the Standard makes a clear distinction between the two. The distinction is chiefly important when discussing functions and templates.

Argument
An argument is one of the following: an expression in the comma-separated list that is bound by the parentheses in a function call; a sequence of one or more preprocessor tokens in the comma-separated list that is bound by the parentheses in a function-like macro invocation; the operand of a throw-statement or an expression, type, or template-name in the comma-separated list that is bound by the angle brackets in a template instantiation. An argument is also called an actual parameter.

Parameter
A parameter is one of the following: an object or reference that is declared in a function declaration or definition (or in the catch clause of an exception handler); an identifier from the comma-separated list that is bound by the parentheses immediately following the macro name in a definition of a function-like macro; or a template-parameter. A parameter is also called a formal parameter.

The following example demonstrates the difference between a parameter and an argument:

void func(int n, char * pc); //n and pc are parameters
template <class T> class A {}; //T is a a parameter
int main()
{
char c;
char *p = &c;
func(5, p); //5 and p are arguments
A<long> a; //'long' is an argument
A<char> another_a; //'char' is an argument
return 0;
}