level6@io:/levels$ cat level06.c
//written by bla
//inspired by nnp
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

enum{
LANG_ENGLISH,
LANG_FRANCAIS,
LANG_DEUTSCH,
};

int language = LANG_ENGLISH;

struct UserRecord{
	char name[40];
	char password[32];
	int id;
};

void greetuser(struct UserRecord user){
	char greeting[64];
	switch(language){
		case LANG_ENGLISH:
			strcpy(greeting, "Hi "); break;
		case LANG_FRANCAIS:
			strcpy(greeting, "Bienvenue "); break;
		case LANG_DEUTSCH:
			strcpy(greeting, "Willkommen "); break;
	}
	strcat(greeting, user.name);
	printf("%s\n", greeting);
}

int main(int argc, char **argv, char **env){
	if(argc != 3) {
		printf("USAGE: %s [name] [password]\n", argv[0]);
		return 1;
	}

	struct UserRecord user = {0};
	strncpy(user.name, argv[1], sizeof(user.name));
	strncpy(user.password, argv[2], sizeof(user.password));

	char *envlang = getenv("LANG");
	if(envlang)
		if(!memcmp(envlang, "fr", 2))
			language = LANG_FRANCAIS;
		else if(!memcmp(envlang, "de", 2))
			language = LANG_DEUTSCH;

	greetuser(user);
}