指针与地址

#include <iostream>
using namespace std;
int main() {
    char s1[] = "Hello World";      //字母10位，空格1位，结尾'\0'占一位
    char *s2 = "Hello World";      //一个指针占4位
    cout << "size of s1: " << sizeof(s1) << endl;       //12
    cout << "size of *s1: " << sizeof(*s1) << endl;    //*s1='H',长度为1
    cout << "size of &s1: " << sizeof(&s1) << endl;    //4
    cout << "size of s2: " << sizeof(s2) << endl;      //4
    cout << "size of *s2: " << sizeof(*s2) << endl;     //1
    cout << "size of &s2: " << sizeof(&s2) << endl;     //4
}