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  1. #include <stdio.h>//第０講演習 3-1
  2.  
  3. int is_uruu(int year){
  4. 	if(year%4==0){
  5. 		if(year%100==0){
  6. 			if(year%400==0){
  7. 				return 1;
  8. 			}
  9. 			else return 0;
  10. 		}
  11. 		else {
  12. 			return 1;
  13. 		}
  14. 	}
  15. 	else{
  16. 		return 0;
  17. 	}
  18. }
  19. int maxday_of_month(int y, int m){
  20. 	if(m==1 || m==3 || m==5 || m==7 || m==8 || m==10 || m==12){
  21. 		return 31;
  22. 	}
  23. 	else if(m==4 || m==6 || m==9 || m==11){
  24. 		return 30;
  25. 	}
  26. 	else if(m==2){
  27. 		int a;
  28. 		a=is_uruu(y);
  29. 		if(a==1){
  30. 			return 29;
  31. 		}
  32. 		else if (a==0){
  33. 			return 28;
  34. 		}
  35. 	}
  36. }
  37. int main() {
  38. 	int year,month,day;
  39. 	scanf("%d %d",&year,&month);
  40. 	day=maxday_of_month(year,month);
  41. 	printf("%d年%d月は%d日まである\n",year,month,day);
  42. 	return 0;
  43. }
  44.  
Success #stdin #stdout 0s 5328KB
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2024 2
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2024年2月は29日まである
https://ideone.com/a7fHg6
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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