recvfrom()函数问题 [英] recvfrom() function question

问题描述

在recvfrom()函数中，我可以将第二行char * buf更改为未签名的char * buf吗?我有一些示例代码正在尝试编译，并且它的statind表示，由于大小原因，缓冲区需要为无符号char *.

In the recvfrom() function can I change the second line char *buf to an unsigned char *buf? I have some sample code that I am trying to compile and it''s statind that the buffer needs to be an unsigned char* because of the size.

int recvfrom(
  __in         SOCKET s,
  __out        char *buf,
  __in         int len,
  __in         int flags,
  __out        struct sockaddr *from,
  __inout_opt  int *fromlen
);

推荐答案

您可以将unsigned char的缓冲区传递到函数，方法是:

You may pass a buffer of unsigned char to the function, this way:

  unsigned char buf[BUFFER_SIZE];
  //...
  recvfrom(s, reinterpret_cast<char>(buf), ...);
</char>

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