题解 | 句子逆序

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

string reverseSentence(const string& sentence) {
    // 使用字符串流分割句子为单词
    vector<string> words;
    stringstream ss(sentence);
    string word;
    while (ss >> word) {
        words.push_back(word);
    }

    // 逆序遍历拼接为句子
    string reversedSentence;
    for (size_t i = 0; i < words.size(); ++i) {
        if (i > 0) {
            reversedSentence += " ";
        }
        reversedSentence += words[words.size() - 1 - i];
    }

    return reversedSentence;
}

int main() {
    string sentence;
    // 输入句子
    getline(cin, sentence);
    // 逆序并输出结果
    string result = reverseSentence(sentence);
    cout << result << endl;
    return 0;
}