string的常见用法

#include <string>
#include <iostream>

using namespace std;

int main() {
    string str1 = "aaaaaaa", str2 = "bbba";
    if (str1 < str2) printf("yes\n");//字典序比较
    str1.erase(str1.begin());//删除某个字符
    str1.erase(str1.begin(), str1.end() - 1);//删除区间
    cout << str1 << endl;
    string str3 = "thank you for your smile", str4 = "for";
    //查找子串第一次出现的位置
    if (str3.find(str4) != string::npos) cout << str3.find(str4) << endl;
}

1060 Are They Equal