Question

I have

run(){
...
struct sockaddr_in from;
int i = recvpacket(buffer,from, fromlen)
...
}


recvpacket(char *buffer, struct sockaddr_in from, int fromlen)
{
//udp recvfrom stores the address of the sender in from
}

I get the following runtime Error in VC++

runtime check failure - the variable 'from' is used without being initialized

should I pass by reference, how should I do that?

Answer 1

Two things to fix:

• to remove the warning you have to initialize from like this for example:

  struct sockaddr_in from= {0};

• to get the address when calling recvpacket you have to declare it as by reference

  recvpacket(char *buffer, struct sockaddr_in& from, int fromlen)