sizeof用法注意

// EX_EXAM.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <iostream>using namespace std;void Foo (char str[100]){ cout<< sizeof( str ) <<endl;}int _tmain(int argc, _TCHAR* argv[]){char *a="he";char b[]="he";Foo(a);cout<<sizeof(a)<<endl;cout<<sizeof(b)<<endl;cout<<strlen(a)<<endl;return 0;}