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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. // function header comments
  5. //**************************************************
  6. // Function: validateIrishLicense
  7. //
  8. // Description: Validates an Irish license plate for the years 2013–2024.
  9. //
  10. // Rules: 1) Year must be between 13 and 24 inclusive
  11. //        2) HalfYear must be 1 (Jan–Jun) or 2 (Jul–Dec)
  12. //        3) County must be one of C, D, G, L, T, or W (case-insensitive)
  13. //        4) Sequence number must be between 1 and 999999
  14. //
  15. // Parameters: year - two-digit year (13–24)
  16. //             halfYear - 1 or 2
  17. //             county - county character code
  18. //             seq - integer sequence number
  19. //
  20. // Returns: 1 if all items are valid (True)
  21. //          0 if any item is invalid (False)
  22. //**************************************************
  23.  
  24. int validateIrishLicense(int year, int halfYear, char county, int seq)
  25. {
  26.     char c; // lowercase version of county
  27.  
  28.     // Check year range  (use OR instead of AND)
  29.     if (year < 13 && year > 24)
  30.         return 0;
  31.  
  32.     // Check halfYear value
  33.     if (halfYear != 1 && halfYear != 2)
  34.         return 0;
  35.  
  36.     // Check valid county (case-insensitive)
  37.     c = (char)tolower((unsigned char)county);
  38.     if (c != 'c' && c != 'd' && c != 'g' &&
  39.         c != 'l' && c != 't' && c != 'w')
  40.         return 0;
  41.  
  42.     // Check sequence number range (use OR instead of AND)
  43.     if (seq < 1 && seq > 999999)
  44.         return 0;
  45.  
  46.     // All checks passed
  47.     return 1;
  48. }
  49.  
  50. // main function for testing
  51. int main(void)
  52. {
  53.     printf("Test 1: %d\n", validateIrishLicense(13, 1, 'D', 21));       // valid
  54.     printf("Test 2: %d\n", validateIrishLicense(13, 3, 'K', 1));        // invalid
  55.     printf("Test 3: %d\n", validateIrishLicense(24, 1, 'C', 1245891));  // invalid
  56.     printf("Test 4: %d\n", validateIrishLicense(20, 2, 'w', 999999));   // valid
  57.     return 0;
  58. }
  59.  
Success #stdin #stdout 0.01s 5316KB
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stdin
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Standard input is empty
stdout
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Test 1: 1
Test 2: 0
Test 3: 1
Test 4: 1
https://ideone.com/D7jySH
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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