题解 | 单词倒排

#include <iostream>
#include <vector>
#include <cctype>
#include <algorithm>
using namespace std;

int main() {
    string str;
    getline(cin, str);
    vector<string> words;
    string word;
    for(int i = 0; i < str.size(); ++i) {
        if(isalpha(str[i])) {
            word += str[i];
            if(i == str.size() - 1){ //最后一个字符不要忘记处理
                words.push_back(word);
            }
        } else {
            if(!word.empty()) {
                words.push_back(word);
                word = "";
            }
        }
    }
    reverse(words.begin(), words.end());

    for(const string& word: words) {
        cout << word << " ";
    }
    return 0;
}