C++primer 11.4練習題

#include<iostream>
#include<vector>
#include<string>
#include<map>
#include<set>

using namespace std;

void dancijishu(istream& is);

int main() {
	dancijishu(cin);
	return 0;
}

void dancijishu(istream& is) {
	map<string, size_t> m;
	set<string> se{ "hehe","haha" };
	string word;
	string bd = "~!@#$%^&*()_+}{:\\\"?></*-+.`[]\;',./";//用來比對标點，其中有幾個字元需要轉義
	while (is >> word) {
		while (word.find_first_of(bd) != string::npos) {//查找出現的标點，并去除标點
			word.erase(word.find_first_of(bd), 1);
		}
		for (auto &c : word) {//查找string内出現的大寫，轉為小寫
			c = tolower(c);
		}
		if (se.find(word) == se.end()) {//計數
			++m[word];
		}
		else {
			cout << "您輸入的為過濾詞\n";
		}
	}
	for (auto& c : m) {
		cout << c.first << "次數為" << c.second;
	}
}