比赛时被模拟题打自闭了，本来以为是个比较麻烦的模拟，实际上只要会C++的regex不到40行就能把这个题过掉了(orz smz）
regex是用来处理正则表达式，里面有个函数regex_replace(string s, regex re, string new_string)可以将s中满足正则表达式re的所有位置替换成new_string。
#include <bits/stdc++.h>
#include <regex>
using namespace std;
int main() {
int n;
scanf("%d", &n);
while(n--) {
cout << s << endl;
getline(cin, s);
cout << s << endl;
s = regex_replace(s, regex(R"(\s+)"), " ");
if(s.front() == ‘ ‘) s.erase(s.begin());
if(s.back() == ‘ ‘) s.pop_back();
s = regex_replace(s, regex(R"( !)"), "!");
s = regex_replace(s, regex(R"( ,)"), ",");
s = regex_replace(s, regex(R"( \.)"), ".");
s = regex_replace(s, regex(R"( \?)"), "?");
s = regex_replace(s, regex(R"( ‘)"), "‘");
for (auto &c : s) {
if(c != ‘I‘) c = tolower(c);
}
s = regex_replace(s, regex(R"(\bcan you\b)"), "_I can");
s = regex_replace(s, regex(R"(\bcould you\b)"), "_I could");
s = regex_replace(s, regex(R"(\bI\b)"), "you");
s = regex_replace(s, regex(R"(\bme\b)"), "you");
s = regex_replace(s, regex(R"(\?)"), "!");
s = regex_replace(s, regex(R"(\b_I\b)"), "I");
cout << "AI: " << s << endl;
}
}
原文：https://www.cnblogs.com/pkgunboat/p/10651822.html