Question

class Solution {
public:
    string morseAlpabet[26] = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.." };
    int uniqueMorseRepresentations(vector<string>& words) {
    string words2morse[200] = {};
    int wordsNum = 0;
    //word count
    while (int(words[wordsNum].length())!=0) {
        wordsNum += 1;
    }
    //count word length
    int wordLength = 0;
    string morseCodesThisWord = "";
    for (int i = 0; i < wordsNum; i++) {
        wordLength = words[i].length();
        morseCodesThisWord = "";
        for (int j = 0; j < wordLength; j++) {
            int wordLetterOrder = int(words[i][j] - 'a');
            morseCodesThisWord += morseAlpabet[wordLetterOrder];
        }
        words2morse[i] = morseCodesThisWord;
    }
    set<string> morseKind(words2morse, words2morse + wordsNum);
    return int(morseKind.size());
    }
};

此代码在Visual Studio 2017本地环境中运行时效果很好，但是在Leetcode中运行时，它会引发Runtimr错误，例如“对绑定到'value_type'类型的空指针的引用”，我不知道它是否可以接受，但我必须先处理此错误。有人可以帮忙吗？请！

Answer 1

好吧，我终于找到了:( words[wordsNum]是错误的方式，我们应该直接使用words.size()。在像这样更改代码之后。被接受了。

class Solution {
public:
    string morseAlpabet[26] = { ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.." };
    int uniqueMorseRepresentations(vector<string>& words) {
        string words2morse[200] = {};
        //count word length
        int wordLength = 0;
        string morseCodesThisWord = "";
        for (int i = 0; i < words.size(); i++) {
            wordLength = words[i].length();
            morseCodesThisWord = "";
            for (int j = 0; j < wordLength; j++) {
                int wordLetterOrder = int(words[i][j] - 'a');
                morseCodesThisWord += morseAlpabet[wordLetterOrder];
            }
            words2morse[i] = morseCodesThisWord;
        }
        set<string> morseKind(words2morse, words2morse +  words.size());
        return int(morseKind.size()); 
    }
};

LeetCode804。唯一的摩尔斯电码码，引用绑定到类型为'value_type'

1 个答案: