diff --git a/searching/jump_search.c b/searching/jump_search.c index 7359655410..a240d65a7f 100644 --- a/searching/jump_search.c +++ b/searching/jump_search.c @@ -1,85 +1,73 @@ /** - * @file jump_search.c - * @brief Implementation of [jump - * search](https://en.wikipedia.org/wiki/Jump_search) algorithm. + * Jump search implementation + * author: George-Anastasios Koutsovasilis + * github: https://github.com/koutsovasilis-tech + * @param arr The sorted array + * @param size The size of the sorted array + * @param x The element we are trying to find */ -#include -#include + #include +#include +#include +#include -/** - * @brief Macro to return the minimum of two values - */ -#define min(X, Y) ((X) < (Y) ? (X) : (Y)) -/** - * @brief Implement Jump-search algorithm - * - * @param [in] arr Array to search within - * @param x value to search for - * @param n length of array - * @return index where the value was found - * @return -1 if value not found - */ -int jump_search(const int *arr, int x, size_t n) +int jump_search(int arr[], size_t size, int x) { - int step = floor(sqrt(n)); - int prev = 0; - - while (arr[min(step, n) - 1] < x) + if (size == 0) return -1; + size_t step = sqrt(size); + size_t prev = 0; + size_t i = 0; + while (i < size && arr[i] < x) // jumps till it finds the correct block or it exceeds it { - prev = step; - step += floor(sqrt(n)); - if (prev >= n) + prev = i; + i += step; + if (prev >= size) { return -1; } } - - while (arr[prev] < x) + size_t limit = (i < size) ? i : size - 1; // limit because i might be larger than size + for (size_t m = prev; m <= limit; m++) // linear search { - prev = prev + 1; - if (prev == min(step, n)) + if (arr[m] == x) { - return -1; + return m; } } - if (arr[prev] == x) - { - return prev; - } - return -1; + return -1; } - -/** - * @brief Test implementation of the function - * - */ -void test() +int main() { + // Already sorted array for the tests int arr[] = {0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610}; - size_t n = sizeof(arr) / sizeof(int); + int size = sizeof(arr) / sizeof(arr[0]); - int x = 55; - printf("Test 1.... "); - int index = jump_search(arr, x, n); - assert(index == 10); - printf("passed\nTest 2.... "); - x = 56; - index = jump_search(arr, x, n); - assert(index == -1); - printf("passed\nTest 3.... "); - x = 13; - index = jump_search(arr, x, n); - assert(index == 7); - printf("passed\n"); -} + // Test Case 1: Element in the middle + int target1 = 55; + int result1 = jump_search(arr, size, target1); + assert(arr[result1] == target1); + printf("Test 1 Passed: Found %d at index %d\n", target1, result1); -/** - * @brief Main function - */ -int main() -{ - test(); + // Test Case 2: Element at the start + int target2 = 0; + int result2 = jump_search(arr, size, target2); + assert(result2 == 0); + printf("Test 2 Passed: Found %d at index %d\n", target2, result2); + + // Test Case 3: Element at the end + int target3 = 610; + int result3 = jump_search(arr, size, target3); + assert(result3 == size - 1); + printf("Test 3 Passed: Found %d at index %d\n", target3, result3); + + // Test Case 4: Element does not exist + int target4 = 100; + int result4 = jump_search(arr, size, target4); + assert(result4 == -1); + printf("Test 4 Passed: Element %d correctly not found\n", target4); + printf("\n--- ALL TESTS PASSED SUCCESSFULLY ---\n"); return 0; } + \ No newline at end of file