bool strcmp(char *str1, char *str2){
	int i = 0;
	bool flag = 1;
	while ((str1[i] != '\0') || (str2[i] != '\0'))	{
		i++;
		if (str1[i] != str2[i]){
			flag = 0;
			break;
		}
	}
	if (flag == 0)
		return 0;
	else
		return 1;
}