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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int less_int(const void* left, const void* right) {
  5.     return *((const int*)left) - *((const int*)right);
  6. }
  7.  
  8. int main(void) {
  9.     size_t num_elements = 500;
  10.     int* a = malloc(num_elements*sizeof(int));
  11.     for(size_t i=0 ; i<num_elements ; i++) {
  12.         a[i] = rand() % num_elements;
  13.     }
  14.     qsort(a, num_elements, sizeof(int), less_int);
  15.     size_t num_rand = 100;
  16.     int* r = malloc(num_rand*sizeof(int));
  17.     for(size_t i=0 ; i < num_rand ; i++) {
  18.         r[i] = rand() % num_rand;
  19.     }
  20.  
  21.     for (size_t i = 0 ; i != num_rand ; i++) {
  22.         int *p = (int*) bsearch (&r[i], a, num_elements, sizeof(int), less_int);
  23.         if (p) {
  24.             printf ("%d is in the array.\n", *p);
  25.         } else {
  26.             printf ("%d is not in the array.\n", r[i]);
  27.         }
  28.     }
  29.  
  30.     free(a);
  31.     free(r);
  32.     return 0;
  33. }
  34.  
Success #stdin #stdout 0.01s 1808KB
comments (?)
stdin
copy 
Standard input is empty
stdout
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61 is not in the array.
42 is in the array.
60 is in the array.
17 is not in the array.
23 is not in the array.
61 is not in the array.
81 is in the array.
9 is in the array.
90 is in the array.
25 is not in the array.
96 is not in the array.
67 is in the array.
77 is not in the array.
34 is in the array.
90 is in the array.
26 is in the array.
24 is in the array.
57 is not in the array.
14 is not in the array.
68 is in the array.
5 is in the array.
58 is in the array.
12 is in the array.
86 is in the array.
0 is in the array.
46 is in the array.
26 is in the array.
94 is in the array.
16 is not in the array.
52 is not in the array.
78 is not in the array.
29 is in the array.
46 is in the array.
90 is in the array.
47 is not in the array.
70 is in the array.
51 is in the array.
80 is not in the array.
31 is in the array.
93 is not in the array.
57 is not in the array.
27 is in the array.
12 is in the array.
86 is in the array.
14 is not in the array.
55 is in the array.
12 is in the array.
90 is in the array.
12 is in the array.
79 is in the array.
10 is not in the array.
69 is in the array.
89 is not in the array.
74 is not in the array.
55 is in the array.
41 is in the array.
20 is not in the array.
33 is in the array.
87 is in the array.
88 is not in the array.
38 is in the array.
66 is not in the array.
70 is in the array.
84 is in the array.
56 is in the array.
17 is not in the array.
6 is in the array.
60 is in the array.
49 is in the array.
37 is in the array.
5 is in the array.
59 is in the array.
17 is not in the array.
18 is not in the array.
45 is in the array.
83 is not in the array.
73 is not in the array.
58 is in the array.
73 is not in the array.
37 is in the array.
89 is not in the array.
83 is not in the array.
7 is in the array.
78 is not in the array.
57 is not in the array.
14 is not in the array.
71 is in the array.
29 is in the array.
0 is in the array.
59 is in the array.
18 is not in the array.
38 is in the array.
25 is not in the array.
88 is not in the array.
74 is not in the array.
33 is in the array.
57 is not in the array.
81 is in the array.
93 is not in the array.
58 is in the array.
https://ideone.com/01CDC
language:
C99 (gcc 8.3)
created:
11 years ago
visibility:
public

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