C ++：一个字符分割字符串 [英] C++: Splitting a string by a character

问题描述

我知道这是一个很简单的问题，但我只是想解决它自己一劳永逸

I know this is a quite easy problem but I just want to solve it for myself once and for all

我只想一个字符串分割成以字符为分割符的数组。 （很像C＃的著名的 .Split（）功能。当然，我可以申请的蛮力方法，但我不知道是否还有什么比这更好的。

I would simply like to split a string into an array using a character as the split delimiter. (Much like the C#'s famous .Split() function. I can of course apply the brute-force approach but I wonder if there anything better than that.

到目前为止，我已经搜索并可能在最接近的解决方案的方法是在使用的strtok（）中，但由于它的不便之处（将你的字符串为char阵列等），我不喜欢使用它。有没有实现这更容易的方式？

So far the I've searched and probably the closest solution approach is the usage of strtok(), however due to it's inconvenience(converting your string to a char array etc.) I do not like using it. Is there any easier way to implement this?

注意：我​​想强调这一点，因为人们可能会问：为什么强力不起作用。我的蛮力解决方案是创建一个循环，并使用 SUBSTR（）函数内。然而，因为它需要在起点和长度，它的时候我想要拆分日期失败。因为用户可能输入为2012/7/12或者2011年7月3日，在这里我真的可以告诉长度计算/分隔符的下一个位置之前。

Note: I wanted to emphasize this because people might ask "How come brute-force doesn't work". My brute-force solution was to create a loop, and use the substr() function inside. However since it requires the starting point and the length, it fails when I want to split a date. Because user might enter it as 7/12/2012 or 07/3/2011, where I can really tell the length before calculating the next location of '/' delimiter.

推荐答案

使用向量，字符串和字符串流。一点点繁琐，但它的伎俩。

Using vectors, strings and stringstream. A tad cumbersome but it does the trick.

std::stringstream test("this_is_a_test_string");
std::string segment;
std::vector<std::string> seglist;

while(std::getline(test, segment, '_'))
{
   seglist.push_back(segment);
}

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