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  1.  
  2. /* input a list of elements into an array,
  3.  * and then print the smallest element. 
  4.  * Here we use pointers to implement the smallest function. */
  5.  
  6. #include <stdio.h>
  7. #define TABLESIZE 12
  8.  
  9. int input(int [], const int);
  10. int *smallest(int *const, const int);
  11.  
  12. int main(void)
  13. {
  14.   int size, *index;
  15.   int table[TABLESIZE];
  16.  
  17.   if ((size = input(table, TABLESIZE)) > TABLESIZE)
  18.      printf("Too many elements, max is %d\n", TABLESIZE);
  19.   else {
  20.      index = (int *)smallest(table, size);
  21.      printf("The smallest element is %d\n", *index);
  22.   }
  23. }
  24.  
  25. int input(int table[], const int limit)
  26. {
  27.   int size;  /* expected number */
  28.   int k;     /* loop control */
  29.  
  30.   printf("Enter number of data items: ");
  31.   scanf("%d", &size);
  32.  
  33.   if (size > limit) return (size);
  34.  
  35.   for (k = 0; k < size; k++)
  36.      scanf("%d", &table[k]);
  37. }
  38.  
  39. /* Computing the smallest element. */
  40. int *smallest(int *const array, const int limit)
  41. {
  42.   int *index, *final, *subscript;
  43.   int least;
  44.  
  45.   index = array;
  46.   final = array + limit;
  47.   least = *index;
  48.   for (subscript = array + 1; subscript < final; subscript++)
  49.        if (*subscript < least)
  50.           least = *(index=subscript);
  51.  
  52.   return (index);
  53. }
  54.  
  55.  
Success #stdin #stdout 0s 9432KB
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Enter number of data items: The smallest element is 0
https://ideone.com/BFjr7Q
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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