STL 正则表达式-regex运用

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// Algorithm.cpp : 定义控制台应用程序的入口点。
//#include "stdafx.h"
#include "MainFrame.h"
#include <fstream>
#include <locale>
#include <regex>
using namespace std;int main()
{regex rTime("(?:[0]?[0-9]|1[0-9]|2[0-3])(:(?:0?[0-9]|[1-5][0-9])){2}");//输入时间，判断是否满足格式（00:00:00）string str;while (true){cin >> str;if (str == "q") break;if (regex_match(str, rTime)){cout << "the time : " << str << endl;}else{cout << "Invalid date!" << endl;}}//匹配一个或者多个字母切结尾为dayregex reg1("\\w+day");string s1 = "saturday";string s2 = "saturday and sunday";smatch r1;smatch r2;cout << boolalpha << regex_match(s1, r1, reg1) << endl;cout << boolalpha << regex_match(s2, r2, reg1) << endl;cout << "s1匹配结果：" << r1.str() << endl;cout << "s2匹配结果：" << r2.str() << endl;cout << endl;cout << "-------------regex_search-------" << endl;smatch rr1;smatch rr2;cout << boolalpha << regex_search(s1, rr1, reg1) << endl;cout << "s1匹配结果：" << rr1.str() << endl;cout << boolalpha << regex_search(s2, rr2, reg1) << endl;cout << "s2匹配结果：" << rr2.str() << endl;cout << endl;cout << "iterator结果：" << endl;sregex_iterator it(s2.begin(), s2.end(), reg1);sregex_iterator end;for (; it != end; ++it){cout << it->str() << endl;//cout << *it << endl; 错误}cout << endl;cout << "token_iterator结果：" << endl;sregex_token_iterator tit(s2.begin(), s2.end(), reg1);sregex_token_iterator tend;for (; tit != tend; ++tit){cout << tit->str() << endl;//cout << *tit << endl;}cout << endl;//匹配IPregex reg2("(\\d{1,3}):(\\d{1,3}):(\\d{1,3}):(\\d{1,3})");string ip = "192:168:1:1";smatch m;regex_match(ip, m, reg2);cout << "输出：str()" << endl;cout << m.str() << endl;cout << m.str(1) << endl;cout << m.str(2) << endl;cout << m.str(3) << endl;cout << m.str(4) << endl;cout << "输出：[i]" << endl;cout << m[0] << endl;cout << m[1] << endl;cout << m[2] << endl;cout << m[3] << endl;cout << m[4] << endl;cout << endl;//输出结果同上//regex_search(ip, m, str2);cout << endl;string ip2 = "0:11:222:333 4:55:66:7";sregex_iterator ip_it(ip2.begin(), ip2.end(), reg2);sregex_iterator ip_end;for (; ip_it != ip_end; ++ip_it){cout << ip_it->str() << endl;cout << ip_it->str(1) << endl;cout << ip_it->str(2) << endl;cout << ip_it->str(3) << endl;cout << ip_it->str(4) << endl;}return 0;
}