[英]How to write in a buffer at specific byte in c++?
I have a char buffer of length 50 bytes.我有一个长度为 50 字节的字符缓冲区。 In this buffer, at 20-21 bytes, I want to write a short number, of size 2 bytes, say -1234, specifically at those bytes only?
在这个缓冲区中,在 20-21 字节,我想写一个短数字,大小为 2 字节,比如说 -1234,特别是那些字节? How can I do that?
我怎样才能做到这一点?
Looks trivial.看起来微不足道。 Not sure whether this is what you want.
不确定这是否是您想要的。
#include <cstring>
char* pc = ...;
short num = ...;
std::memcpy(pc + 20, &num, 2);
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