container-string-存取

#include <iostream>

using namespace std;

#include <string>

void test01()

{

string  str1 = "hello";

//[]s

for (int i = 0; i<str1.size(); i++)

{

cout << str1[i] << " ";

}

//at

cout << endl;

for (int i = 0;i< str1.size(); i++)

{

cout << str1.at(i) << " ";

}

cout << endl;

str1[0] = 'x';

cout << str1<<endl;

str1.at(0) = 'g';

cout << str1 << endl;

}

int main()

{

test01();

system("pause");

return 0;

}