#include #include #include #include "day.h" int main(int argc, char * argv[]) { uint64_t day_number; if (argc < 2) { printf("Advent of **C**ode\n"); printf("%s DAY_NUMBER", argv[0]); return -1; } day_number = strtol(argv[1], NULL, 10); switch (day_number) { case 1: day_1(); break; default: printf("Invalid day ding dong!\n"); return -2; } }