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  1. #include <stdio.h>
  2.  
  3. // **************************************************
  4. // Function: frequency
  5. //
  6. // Description:
  7. //   Counts how many times the value x appears among the
  8. //   first n elements of theArray (indices 0 .. n-1).
  9. //
  10. // Parameters:
  11. //   theArray[] - array of integers to search
  12. //   n          - number of elements to check
  13. //   x          - integer value to count
  14. //
  15. // Returns:
  16. //   frequency (int) - number of times x is found
  17. // **************************************************
  18. int frequency (int theArray[], int n, int x)
  19. {
  20.     int frequency; /* how many times x is found */
  21.  
  22.     frequency = 0; /* initialize count */
  23.  
  24.     /* loop through every element in theArray */
  25.     for (int i = 0; i < n; i++)
  26.     {
  27.         /* if the element x is found, increment frequency */
  28.         if (theArray[i] == x)
  29.         {
  30.             frequency++;
  31.         }
  32.     }
  33.  
  34.     return frequency;
  35. }
  36.  
  37. // **************************************************
  38. // Function: main
  39. //
  40. // Description:
  41. //   Tests the frequency() function with a sample array.
  42. // **************************************************
  43. int main(void)
  44. {
  45.     int theArray[] = {5, 7, 23, 8, 23, 67, 23};
  46.     int n = 7;
  47.     int x = 23;
  48.  
  49.     int result = frequency(theArray, n, x);
  50.  
  51.     printf("The value %d appears %d times in the array.\n", x, result);
  52.  
  53.     return 0;
  54. }
  55.  
Success #stdin #stdout 0.01s 5276KB
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Standard input is empty
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The value 23 appears 3 times in the array.
https://ideone.com/zHCedt
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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