#define _CRT_SECURE_NO_WARNINGS #include #include long total_days(int year, int month, int day); void calculateDate(long total); void calculateDate2(long total); int main(void) { int year, month, day, dayafter; long total; printf("기준일 (년월일) 입력 : "); scanf("%d %d %d", &year, &month, &day); printf("몇일 후 날수 입력:"); scanf("%d", &dayafter); total = total_days(year, month, day) + dayafter - 1; printf("..