题解 A27.统计单词数

#include <bits/stdc++.h>
using namespace std;
int main() {
    string s1, s2;
    getline(cin, s1);  // 读取单词
    getline(cin, s2); // 读取文章（可能包含空格）
    // 将单词转为小写
    for (char &c : s1) c = tolower(c);
    int n = s2.size();
    int cnt = 0, firstPos = -1;
    int i = 0;
    while (i < n) {
        // 跳过非字母
        while (i < n && !isalpha(s2[i])) i++;
        if (i >= n) break;
        int start = i;
        // 提取单词
        string cur;
        while (i < n && isalpha(s2[i])) {
            cur += tolower(s2[i]);
            i++;
        }
        // 比较
        if (cur == s1) {
            cnt++;
            if (firstPos == -1) firstPos = start;
        }
    }
    if (cnt == 0) cout << -1 << endl;
    else cout << cnt << " " << firstPos << endl;
    return 0;
}