用制表符分隔的文本填充字符串向量 [英] populating a string vector with tab delimited text

问题描述

我是C ++的新手。

我正在尝试使用制表符分隔文件中的元素填充矢量。最简单的方法是什么？

I'm trying to populate a vector with elements from a tab delimited file. What is the easiest way to do that?

谢谢！

推荐答案

这可能是最简单的方法，但vcp的方法可能更有效。

This is probably the easiest way to do it, but vcp's approach can be more efficient.

std::vector<string> tokens;
std::string token;
while (std::getline(infile, token, '\t')
{
    tokens.push_back(token);
}

完成。实际上，您可以使用输入迭代器和后插入器，但是为什么呢？

Done. You can actually get this down to about three lines of code with an input iterator and a back inserter, but why?

现在，如果将文件切成几行并用这些行上的制表符隔开，则还必须处理

Now if the file is cut up into lines and separated by tabs on those lines, you also have to handle the line delimiters. Now you just do the above twice, one loop for lines and an inner loop to parse the tabs.

std::vector<string> tokens;
std::string line;
while (std::getline(infile, line)
{
    std::stringstream instream(line)
    std::string token;
    while (std::getline(instream, token, '\t')
    {
        tokens.push_back(token);
    }
}

d如果您需要做线，然后制表符，然后...我不知道...引号？三个循环。但是老实说，我可能正在研究编写状态机。我怀疑您的老师在现阶段想要这样的事情。

And if you needed to do line, then tabs, then... I dunno... quotes? Three loops. But to be honest by three I'm probably looking at writing a state machine. I doubt your teacher wants anything like that at this stage.

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