出道題大家做做，C++的（含答案）

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

我貼上我的答案，拋磚引玉，大家幫忙看看有什麼不足：

[cpp] 
// 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]); 
    } 
}