【语法】sizeof 笔记

来源：互联网发布：python常用函数编辑：程序博客网时间：2024/06/04 19:46

#include <iostream>

#include <string>

using namespace std;

int main(int argc, char* argv[])

{

cout << "sizeof(string) = " << sizeof(string) << endl;

string str[] = {"sdf4", "123", "d"};

string str4[4] = {"str33", "mmmmm"};

cout << "sizeof(str) = " << sizeof(str) << endl;

cout << "sizeof(str4) = " << sizeof(str4) << endl;

string *pStr = new string[2];

pStr[0] = "us";

pStr[1] = "cn";

cout << endl;

cout << "sizeof(pStr) = " << sizeof(pStr) << endl;

cout << "sizeof(*pStr) = " << sizeof(*pStr) << endl;

cout << endl;

char b[] = "fcdg123";

cout << "b = " << b << endl;

cout << "sizeof(b) = " << sizeof(b) << endl;

cout << "*b = "<< *b << endl;

cout << "sizeof(*b) =" << sizeof(*b) << endl;

cout << endl;

char *c = "fcdg123";

cout << "c = " << c << endl;

cout << "sizeof(c) = " << sizeof(c) << endl;

cout << "*c = "<< *c << endl;

cout << "sizeof(*c) =" << sizeof(*c) << endl;

return;

}

sizeof(string) = 16

sizeof(str) = 48

sizeof(str4) = 64

sizeof(pStr) = 4

sizeof(*pStr) = 16

b = fcdg123

sizeof(b) = 8

*b = f

sizeof(*b) =1

c = fcdg123

sizeof(c) = 4

*c = f

sizeof(*c) =1