67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/*
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* C Program to Perform Binary Search using Recursion
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*/
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#include <stdio.h>
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void binary_search(int [], int, int, int);
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void bubble_sort(int [], int);
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int main()
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{
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int key, size, i;
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int list[25];
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printf("Enter size of a list: ");
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scanf("%d", &size);
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printf("Generating random numbers\n");
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for(i = 0; i < size; i++)
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{
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list[i] = rand() % 100;
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printf("%d ", list[i]);
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}
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bubble_sort(list, size);
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printf("\n\n");
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printf("Enter key to search\n");
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scanf("%d", &key);
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binary_search(list, 0, size, key);
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}
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void bubble_sort(int list[], int size)
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{
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int temp, i, j;
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for (i = 0; i < size; i++)
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{
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for (j = i; j < size; j++)
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{
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if (list[i] > list[j])
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{
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temp = list[i];
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list[i] = list[j];
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list[j] = temp;
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}
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}
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}
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}
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void binary_search(int list[], int lo, int hi, int key)
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{
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int mid;
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if (lo > hi)
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{
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printf("Key not found\n");
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return;
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}
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mid = (lo + hi) / 2;
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if (list[mid] == key)
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{
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printf("Key found\n");
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}
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else if (list[mid] > key)
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{
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binary_search(list, lo, mid - 1, key);
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}
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else if (list[mid] < key)
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{
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binary_search(list, mid + 1, hi, key);
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}
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}
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}
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