我如何保留變量以進行比較

Question

您好，即時通訊不知道如何保存變量，讓我們說lastWordLoaded ，然后使用它與字典中正在加載的下一個單詞進行比較，即word ..

我有一個compareWords方法，如果lastWordLoaded> CurrentWord，它將打印出-1，因此這意味着它不是按字母順序排列的；如果lastWordLoaded <CurrentWord，它將打印0，因此，如果文件為按字母順序排列為0。 盡管我不確定如何才能在這種情況下使用lastWordLoaded 。

Dictionary::Dictionary() {
    //check if the file was opened
    if (dictionaryFile.is_open()) {
        while (getline(dictionaryFile, word) &&
            getline(dictionaryFile, definition) &&
            getline(dictionaryFile, type) &&
            getline(dictionaryFile, blank)) {

                    myWords[wordCount] = fromRecord(word, definition, type);
                    if (compareWords(word, lastWordLoaded) != 0)
                    {
                        cout << "\nThe dictionary isnt in alphabetical order." << endl;
                        cout << "Error at word = " << getWordCount() << endl;
                        system("Pause");
                    }
        }
        //close the file
        dictionaryFile.close();     
}

Answer 1

如何將lastWordLoaded在變量中並在周期結束時進行更新，如下所示：

string lastWordLoaded = "";
while (getline(dictionaryFile, word) &&
        getline(dictionaryFile, definition) &&
        getline(dictionaryFile, type) &&
        getline(dictionaryFile, blank)) {

                myWords[wordCount] = fromRecord(word, definition, type);
                if (compareWords(word, lastWordLoaded) != 0)
                {
                    cout << "\nThe dictionary isnt in alphabetical order." << endl;
                    cout << "Error at word = " << getWordCount() << endl;
                    system("pause");
                }
                lastWordLoaded = word;
    }