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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int y,m;
  5. scanf("%d %d",&y,&m);
  6. switch(m){
  7. 	case 1:
  8. 	case 3:
  9. 	case 5:
  10. 	case 7:
  11. 	case 8:
  12. 	case 10:
  13. 	case 12:
  14. 	printf("この月は31日です\n");
  15. 	break;
  16. 	case 4:
  17. 	case 6:
  18. 	case 9:
  19. 	case 11:
  20. 	printf("この月は30日です\n");
  21. 	break;
  22. 	case 2:
  23. 	if((y%4==0&&y%100!=0)||y%400==0){
  24. 		printf("この月は29日です\n");
  25. 		break;
  26. 	}
  27. 	else{
  28. 		printf("この月は28日です\n");
  29. 	}
  30. }
  31. 	return 0;
  32. }
  33.  
Success #stdin #stdout 0s 5332KB
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この月は29日です
https://ideone.com/upguRD
language:
C99 (gcc 8.3)
created:
3 hours ago
visibility:
public

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