c++string字符存取 安静点

string字符存取

string中单个字符存取方式有两种

• char& operator[](int n); //通过[]方式取字符
• char& at(int n); //通过at方法获取字符

示例：

void test01()
{
    string str = "hello world";

    for (int i = 0; i < str.size(); i++)
    {
        cout << str[i] << " ";
    }
    cout << endl;

    for (int i = 0; i < str.size(); i++)
    {
        cout << str.at(i) << " ";
    }
    cout << endl;


    //字符修改
    str[0] = 'x';
    str.at(1) = 'x';
    cout << str << endl;
    
}

int main() {

    test01();

    system("pause");

    return 0;
}