sizeof

//=======================win32平臺====================
#include<iostream>
using namespace std;
void fun(int *P)
{
	cout<<"函數中"<<sizeof(P)<<endl;//4
}
int main()
{
	int A[10];
	int* B=new int[10];
	cout<<"數組名"<<sizeof(A)<<endl;//sizeof(A) = 10
	cout<<"指針"<<sizeof(B)<<endl;//sizeof(B) = 4
	fun(A);//4
}
</iostream>