Code:
#include stdio.h
int search(int [], int, int);
int main()
{
int size, index, key;
int list[20];
int count = 0;
int i;
printf("Enter the size of the list: ");
scanf("%d", &size);
index = size;
printf("Printing the list:\n");
for (i = 0; i < size; i++)
{
list[i] = rand() % size;
printf("%d\t", list[i]);
}
printf("\nEnter the key to search: ");
scanf("%d", &key);
while (index > 0)
{
index = search(list, index - 1, key);
/* In an array first position is indexed by 0 */
printf("Key found at position: %d\n", index + 1);
count++;
}
if (!count)
printf("Key not found.\n");
return 0;
}
int search(int array[], int size, int key)
{
int location;
if (array[size] == key)
{
return size;
}
else if (size == -1)
{
return -1;
}
else
{
return (location = search(array, size - 1, key));
}
}
Output:
Enter the size of the list: 10
Printing the list:
3 6 7 5 3 5 6 2 9 1
Enter the key to search: 5
Key found at position: 6
Key found at position: 4
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