出山题大家做做，C++的

出道题大家做做，C++的

1.      Reverse the words in a given English sentence (string) in C or C++ without requiring a separate buffer to hold the reversed string (programming)

For example:

Input:  REALLY DOGSDISLIKE MONKEYS

Output: MONKEYS DISLIKEDOGS REALLY

 

我贴上我的答案，抛砖引玉，大家帮忙看看有什么不足：

// suppose use of temp variable is allowed
// there is only one space between two words
void reverseSentence(string &strSentence)
{
    vector<string> words;
    string::size_type offsite = 0, sepIndex = string::npos; 

    // extract every words into "words"
    while ((sepIndex = strSentence.find(' ', offsite)) != string::npos)
    {
        words.push_back(strSentence.substr(offsite, sepIndex - offsite));
        offsite = sepIndex + 1;
    }
    if (strSentence.size() > offsite)
        words.push_back(strSentence.substr(offsite, strSentence.size() - offsite));
    
    if (words.empty())
        return;

    // form a new sentence
    strSentence.clear();
    size_t size = words.size();
    for (size_t u=size; u>0; u--)
    {
        if (u < size) strSentence.append(" ");
        strSentence.append(words[u - 1]);
    }
}

1楼houhouzhe昨天 18:20

这道题太简单了，没有兴趣？