Merge sorted array

Signed-off-by: Leo Ma <[email protected]>

088_merge_sorted_array/Makefile

@@ -0,0 +1,2 @@
+all:
+	gcc -O2 -o test merge_array.c

088_merge_sorted_array/merge_array.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+static int binary_search(int *nums, int len, int target)
+{
+    int low = -1;
+    int high = len;
+    while (low + 1 < high) {
+        int mid = high - (high - low) / 2;
+        if (target > nums[mid]) {
+            low = mid;
+        } else {
+            high = mid;
+        }
+    }
+    if (high == len || nums[high] != target) {
+        return -high - 1;
+    } else {
+        return high;
+    }
+}
+
+static void merge(int* nums1, int m, int* nums2, int n)
+{
+    int i, j, len1 = m;
+    for (i = 0; i < n; i++) {
+        int index = binary_search(nums1, len1, nums2[i]);
+        if (index < 0) {
+            index = -index - 1;
+        }
+        for (j = len1 - 1; j >= index; j--) {
+            nums1[j + 1] = nums1[j];
+        }
+        nums1[index] = nums2[i];
+        len1++;
+    }
+}
+
+int main(int argc, char **argv)
+{
+    int i;
+    int nums1[] = { 1, 3, 5, 7, 9, 0, 0, 0, 0, 0 };
+    int nums2[] = { 2, 4, 6, 8, 10 };
+    int size1 = 5;//sizeof(nums1) / sizeof(*nums1);
+    int size2 = sizeof(nums2) / sizeof(*nums2);
+    merge(nums1, size1, nums2, size2);
+    for (i = 0; i < sizeof(nums1) / sizeof(*nums1); i++) {
+        printf("%d ", nums1[i]);
+    }
+    printf("\n");
+    return 0;
+}