while 记录当单词重复出现

int main(){string currWord,preWord; //记录当前单词及前一单词cout << "Enter some strings(Ctrl+Z to end):" << endl;while(cin >> currWord){if(currWord == preWord) //当单词重复出现  if(currWord == preWord && isupper(currWord[0])) //当单词重复出现且以大写字母开头break;elsepreWord = currWord;}if(currWord == preWord && !currWord.empty())cout << "The repeated word" << endl;elsecout << "No repeated word" << endl;return 0;}