STL 正则表达式-regex运用

// 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day
regex 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IP
regex 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;
}