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我正在尝试读取代码并对其进行格式化，以便它在某个点之后切断并转到新行。起初，我试图简单地继续显示连续的字符，并在此时读取的字符数量超过限制后使其进入换行符。但是，如果某个单词超出限制，我需要让该单词开始新行。由于我完全不知道如何仅使用字符来做到这一点，因此我决定尝试使用字符串数组。我的代码如下

char ch;
string words[999];
//I use 999 because I can not be sure how large the text file will be, but I doubt it   would be over 999 words
string wordscount[999];
//again, 999. wordscount will store how many characters are in the word
int wordnum = 0;
int currentnum = 0;
//this will be used later
while (documentIn.get(ch))
{
if (ch != ' ')
//this makes sure that the character being read isn't a space, as spaces are how we differentiate words from each other
{
cout << ch;
//this displays the character being read

在我的代码中，我想将所有字符“保存”到一个字符串中，直到该字符是一个空格。我不知道该怎么做。有谁可以帮我离开这里吗？我想它会是这样的；

words[wordnum] = 'however i add up the characters'
//assuming I would use a type of loop to keep adding characters until I reach a 
//space, I would also be using the ++currentnum command to keep track of how
//many characters are in the word
wordscount[wordnum] = currentnum;
++wordnum;
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2 回答 2

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我不知道你真正想做什么。

如果你想从文件中恢复每一行，你可以这样做：

std::ifstream ifs("in");
std::vector<std::string> words;
std::string word;
while (std::getline(ifs, word))
{
    words.push_back(word);
}
ifs.close();

函数 std::getline() 不会省略空格，例如 ' ', '\t' ，而它将通过 ifs >> 单词进行反转换。

于 2013-10-06T11:22:12.333 回答
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使用输入文件流循环遍历将它们添加到向量的单词，然后 vector.size() 将是单词计数。

std::ifstream ifs("myfile.txt");

std::vector<std::string> words;
std::string word;
while (ifs >> word)
   words.push_back(word);

默认情况下会跳过空白，while 循环将继续，直到到达文件末尾。

于 2013-10-06T10:03:12.673 回答