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  1. #include <stdio.h>
  2.  
  3. int is_uruu(int year)
  4. {
  5.     if(year % 400 == 0)
  6.         return 1;
  7.     else if(year % 100 == 0)
  8.         return 0;
  9.     else if(year % 4 == 0)
  10.         return 1;
  11.     else
  12.         return 0;
  13. }
  14.  
  15. int maxday_of_month(int y, int m)
  16. {
  17.     if(m == 1 || m == 3 || m == 5 || m == 7 ||
  18.        m == 8 || m == 10 || m == 12)
  19.         return 31;
  20.  
  21.     if(m == 4 || m == 6 || m == 9 || m == 11)
  22.         return 30;
  23.  
  24.     if(m == 2)
  25.     {
  26.         if(is_uruu(y))
  27.             return 29;
  28.         else
  29.             return 28;
  30.     }
  31.  
  32.     return 0;
  33. }
  34.  
  35. int days_from(int y, int m, int d)
  36. {
  37.     int i;
  38.     int sum = 0;
  39.  
  40.     for(i = 1; i < m; i++)
  41.     {
  42.         sum += maxday_of_month(y, i);
  43.     }
  44.  
  45.     sum += d - 1;
  46.  
  47.     return sum;
  48. }
  49.  
  50. int main()
  51. {
  52.     printf("%d\n", days_from(2112,1,1));
  53.     printf("%d\n", days_from(2112,1,2));
  54.     printf("%d\n", days_from(2112,3,4));
  55.     printf("%d\n", days_from(2112,9,3));
  56.  
  57.     return 0;
  58. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/lOt6FT
language:
C (gcc 8.3)
created:
10 hours ago
visibility:
public

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