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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5. 	int mon;
  6.  
  7. 	printf("何月ですか？");
  8. 	scanf("%d",&mon);
  9.  
  10. 	switch(mon)
  11. 	{
  12. 	case 1:
  13. 	case 3:
  14. 	case 5:
  15. 	case 7:
  16. 	case 8:
  17. 	case 10:
  18. 	case 12:
  19. 		printf("３１日です。\n");
  20. 		break;
  21. 	case 4:
  22. 	case 6:
  23. 	case 9:
  24. 	case 11:
  25. 		printf("３０日です。\n");
  26. 		break;
  27. 	case 2:
  28. 		printf("２８日です。\n");
  29. 		break;
  30. 	default:
  31. 		printf("入力が無効です。１－１２を入力してください。\n");
  32. 		break;
  33. 	}
  34. 	return 0;
  35. }
Success #stdin #stdout 0s 5320KB
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何月ですか？３０日です。
https://ideone.com/wNcdb3
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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