C++ 代码实现反转句子并去除最后一个空格

非常抱歉我之前的代码有误。以下是修正后的代码，它将在输出最后一个元素时不加空格：

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

std::string reverseWords(const std::string& sentence) {
    std::string reversedSentence = "";

    // Check if sentence length is within the specified range
    int length = sentence.length();
    if (length <= 10 || length >= 1000) {
        return "-1";
    }

    // Split the sentence into individual words
    std::vector<std::string> words;
    std::string word = "";
    for (int i = 0; i < length; i++) {
        char c = sentence[i];
        if (c == ' ') {
            if (!word.empty()) {
                words.push_back(word);
                word = "";
            }
        } else {
            word += c;
        }
    }
    if (!word.empty()) {
        words.push_back(word);
    }

    // Reverse the sequence of words
    std::reverse(words.begin(), words.end());

    // Build the reversed sentence
    for (int i = 0; i < words.size(); i++) {
        reversedSentence += words[i];
        if (i != words.size() - 1) {
            reversedSentence += ' ';
        }
    }

    return reversedSentence;
}

int main() {
    std::string sentence = "I am a student.";

    std::string reversedSentence = reverseWords(sentence);

    std::cout << "Reversed sentence: " << reversedSentence << std::endl;

    return 0;
}

现在代码会在输出最后一个元素时不加空格。非常抱歉之前的错误带来的困扰。