2020년 달력 만들기

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main() {
	int m;
	char* day[7] = { "Sun", "Mon", "Tue", "Wed", "Tur", "Fri", "Sat" };
	int days[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	int flag = 0;
	int k = 0;

	printf("출력하려는 달을 입력하세요: ");
	scanf("%d", &m);

	switch (m) {
	case 1:	flag = 3;	break;
	case 2: flag = 6;	break;
	case 3: flag = 0;	break;	
	case 4: flag = 3;	break;
	case 5: flag = 5;	break;
	case 6: flag = 1;	break;
	case 7: flag = 3;	break;
	case 8: flag = 6;	break;
	case 9:	flag = 2;	break;
	case 10: flag = 4;	break;
	case 11: flag = 0;	break;
	case 12: flag = 2;	break;
	}

	printf("\n결과: %d월\n", m);

	for (int i = 0; i < 7; i++) {
		printf("%s\t", day[i]);
	}

	printf("\n");

	for(int j = 0; j < flag; j++) {
		printf("\t");
		k++;
	}


	for (int i = 1; i <= days[m-1]; i++) {
		if(i < 10)	printf(" %d\t", i);
		else printf("%d\t", i);
		k++;
		if (k == 7) {
			printf("\n");
			k = 0;
		}
	}

	return 0;
}