This C program, using recursion, performs binary search. In this program an array of random number is generated. The user is asked to enter a key. The array of random numbers are sorted and then the binary search operation is performed based on the key.
Here is the source code of the C program to display a linked list in reverse. The C program is successfully compiled and run on a Linux system. The program output is also shown below.
* C Program to Perform Binary Search using Recursion
void binary_search(int , int, int, int);
void bubble_sort(int , int);
int key, size, i;
printf("Enter size of a list: ");
printf("Generating random numbers\n");
for(i = 0; i < size; i++)
list[i] = rand() % 100;
printf("%d ", list[i]);
printf("Enter key to search\n");
binary_search(list, 0, size, key);
void bubble_sort(int list, int size)
int temp, i, j;
for (i = 0; i < size; i++)
for (j = i; j < size; j++)
if (list[i] > list[j])
temp = list[i];
list[i] = list[j];
list[j] = temp;
void binary_search(int list, int lo, int hi, int key)
if (lo > hi)
printf("Key not found\n");
mid = (lo + hi) / 2;
if (list[mid] == key)
else if (list[mid] > key)
binary_search(list, lo, mid - 1, key);
else if (list[mid] < key)
binary_search(list, mid + 1, hi, key);
$ gcc binary_search.c -o binary_search $ a.out Enter size of a list: 10 Generating random numbers 83 86 77 15 93 35 86 92 49 21 Enter key to search 21 Key found
Sanfoundry Global Education & Learning Series – 1000 C Programs.
If you wish to look at other example programs on Searching and Sorting, go to C Programming Examples on Searching and Sorting. If you wish to look at programming examples on all topics, go to C Programming Examples.