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#include <stdio.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> enum { buf_size = 16 }; static char buf[buf_size] = "323543357756889"; int main (int argc, char *argv[]) { struct in_addr addr; int result = 0; if (inet_aton (buf, &addr) != 0) { printf ("%s is seen as a valid IP address\n", buf); result = 1; } return result; }