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//Jon Rohan
//CS3260 Net-Centric Computing Programming Assignment 1
//This assignment is used to determine the IP address of the
//machine the program is being run on. This program is
//Unix specific.
#include <stdio.h>
#include <netdb.h>
int main()
char hostn[400]; //placeholder for the hostname
struct hostent *hostIP; //placeholder for the IP address
//if the gethostname returns a name then the program will get the ip address using gethostbyname
if((gethostname(hostn, sizeof(hostn))) == 0)
hostIP = gethostbyname(hostn); //the netdb.h function gethostbyname
printf("IP address: %s\n", inet_ntoa(*(struct in_addr *)hostIP->h_addr));
printf("ERROR:FC4539 - IP Address not found."); //error if the hostname is not found
return 0;