Convert 2 bytes into an integer

Question

I receive a port number as 2 bytes (least significant byte first) and I want to convert it into an integer so that I can work with it. I\'ve made this:

char buf[         


        

Answer 1

char buf[2]; //Where the received bytes are
int number;
number = *((int*)&buf[0]);

&buf[0] takes address of first byte in buf.
(int*) converts it to integer pointer.
Leftmost * reads integer from that memory address.

If you need to swap endianness:

char buf[2]; //Where the received bytes are
int number;  
*((char*)&number) = buf[1];
*((char*)&number+1) = buf[0];