#include <iostream>

#include <string>

#include <regex>

using namespace std;

int main()

{

//regex_match匹配整个字符串

//reg1匹配大小写字母,不能匹配空格

regex reg1("\\w+day");

smatch r1;

string s1 = "Sat123urdayday";

cout << boolalpha << regex_match(s1,r1,reg1) << endl; //true

cout << "s1匹配结果：" << r1.str() << endl;

//regex_match只返回第一个匹配结果

//string s2 = "saturday and sunday"; //false

string s2 = "saturaday ndsunday"; //true

smatch r2;

cout << boolalpha << regex_match(s2, r2, reg1) << endl; //false

cout << "s2匹配结果：" << r2.str() << " 1234654" << endl; //结果为空

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() << " asdasd5" << endl;

cout << endl;

//使用iterator返回多个匹配结果

//结果要用->

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 << "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;

}

//子表达式匹配

regex reg2("(\\d{1,3}):(\\d{1,3}):(\\d{1,3}):(\\d{1,3})");

string ip = "0:11:222:333";

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;

//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;

}

regex regx("\\d{18}");

regex regx1("\\d{17}+[X]");

smatch sma;

string str = "41282519980203733X";

cout << boolalpha << regex_match(str,sma,regx1) << endl; //true

cout << "s1匹配结果：" << sma.str() << endl;

return 0;

}