将字符串转换为字节（unsigned char）数组cpp [英] converting a string to byte (unsigned char) array cpp

问题描述

这个简单的问题有真正的麻烦。
我有一个这样的字符串：

having real trouble with this simple issue. I have a string like this:

std::string msg = "00 00 00 00 00 06 01 05 00 FF 00 00";

我想要：

unsigned char bbuffer[12] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x01, 0x05, 0x00, 0xFF, 0x00, 0x00 };

有什么办法呢？

推荐答案

如果可能，我建议使用 std :: vector< unsigned char>

If at all possible, I'd advise using a std::vector<unsigned char> instead of an actual array.

使用它，我想我会做这样的：

Using that, I guess I'd do something like this:

std::istringstream buffer(msg);

std::vector<unsigned char> bbuffer;

unsigned int ch;
while (buffer >> std::hex >> ch)
    bbuffer.push_back(ch);

如果你真的坚持数组，你可以这样做：

If you really insist on the array, you could do something like:

std::istringstream buffer(msg);

char bbuffer[12];

unsigned int ch;
for (int i=0; buffer >> std::hex >> ch; i++)
    bbuffer[i] = ch & 0xff;

但通常优先使用向量。

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