Small C Program-Convert IP address to it's base10 form

/*SOURCE CODE OF SIMPLE PROGRAM--CONVERT IP ADRESS TO IT'S BASE10 FORM*/ #include<stdio.h> #include<getopt.h> #include<sys/types.h> #include<locale.h> #include<regex.h> #define PACKAGE "ip2b10" #define VERSION "0.0.2" #define URL     "WWW" #define IPEXPR  "([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})" void print_help(int exval); void print_version(int exval); int main(int argc, char *argv[]) {  regex_t re;  int opt = 0;  int print_flag = 0;  long unsigned int result = 0;  int var1 = 0, var2 = 0;  int ...

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