add jumpsearch

Searches/Jump_Search.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <math.h>
+#define min(X,Y) ((X) < (Y) ? (X) : (Y))  
+int jump_search(int* arr, int x);
+int n;
+
+int main() {
+	int arr[] = { 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610 };
+	n = sizeof(arr) / sizeof(int);
+	int x = 55;
+	int index = jump_search(arr, x);
+	printf("\nNumber %d is at index %d\n", x, index);
+}
+
+int jump_search(int* arr, int x) {
+	int step = floor(sqrt(n));
+	int prev = 0;
+	while (*(arr + (min(step, n) - 1)) < x) {
+		prev = step;
+		step += floor(sqrt(n));
+		if (prev >= n)
+			return -1;
+	}
+
+	while (*(arr + prev) < x) {
+		prev = prev + 1;
+		if (prev == fmin(step, n))
+			return -1;
+	}
+	if (*(arr + prev) == x)
+		return prev;
+	return -1;
+}