using winsock send function

[jimberger]

Hello,

I am trying to send a unsigned long using the send function defined in winsock

that is,

if (send(sockfd, pCatCode, MAXDATASIZE, 0) == -1)
{
printf("Unable to send data\n"
}

pCatCode is a unsigned long but i get the following compile error

cannot convert parameter 2 from 'unsigned long' to 'const char *'

any suggestions
many thanks

 

[Salem]

> pCatCode is a unsigned long but i get the following compile error
So why does it have a 'hungarian' p at the start of the name, fooling you into thinking it may be a pointer?

My guess is that it should be

n = send(sockfd, &CatCode, sizeof(CatCode), 0);
if ( n == -1 ) {
  printf("Unable to send data\n");
}
if ( n != sizeof(CatCode) ) {
  printf("Incomplete send, sent only %d\n", n);
}

--

 

[ArkM]

It's more safety (honestly to use an explicit cast:

(const char*)&CatCode...

.
C (and C++) can't implicitly convert (unsigned long*) to (char*)...