比较从C中的套接字接收的字符串数据 [英] Comparing string data received from a socket in C

问题描述

我有一个关于套接字的问题。我有这个代码：

  while（bytes = recv（sClient，cClientMessage，599，0））{
  

这将把消息记录到cClientMessage中，消息总是消息。我如何做一个if语句如 if（cClientMessage ==Message）{// do func} 。现在这个代码不会做我想要的功能。我认为这是因为它没有收到消息的权利。

解决方案

尝试：

  if（strcmp（cClientMessage，Message））== 0）{
 // do something 
} 
  

按照strager的建议修改：

更好的解决方案（cClientMessage，Message，strlen（cClientMessage，Message）和 Message）））== 0）{
// do something
}

I have a question on sockets. I have this code:

while(bytes = recv(sClient, cClientMessage, 599, 0)){

This puts the message it recives into cClientMessage and the message is always "Message". How I made an if statement like if(cClientMessage == "Message"){//do func}. Now this code will not do the function I want. I think this is because it's not receiving the message right. Can someone help me?

解决方案

Try:

if( strcmp( cClientMessage, "Message")) == 0 ) {
   // do something
}

Edit, following suggestion from strager:

A better solution, which does not depend on the received data being null terminated is to use memcmp:

if( memcmp( cClientMessage, "Message", strlen( "Message") )) == 0 ) {
   // do something
}

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