字符串(5)——统计单词个数

重点：set和istringstream的应用

#include <algorithm>
#include <iostream>
#include <set>
#include <sstream>
#include <string>
using namespace std;
int n;
string s;
const set<string> mod{"the", "a", "an", "of", "for", "and"};
int main() {
    cin >> n;
    cin.ignore();
    for (int i = 0; i < n; i++) {
        getline(cin, s);
        for (auto &i : s)
            i = tolower(i);
        string temp;
        istringstream is(s);
        int cnt = 0;
        while (is >> temp) {
            if (mod.find(temp) == mod.end())
                cnt++;
        }
        cout << "case #" << i << ":\n" << cnt << '\n';
    }

    return 0;
}

补充资料：
https://blog.csdn.net/Jacky_chenjp/article/details/70233212?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task