Create BinaryInsertionSort.cpp

Author: swampxx

C++/BinaryInsertionSort.cpp

@@ -0,0 +1,59 @@
+
+// C program for implementation of binary insertion sort 
+#include <stdio.h> 
+  
+// A binary search based function to find the position 
+// where item should be inserted in a[low..high] 
+int binarySearch(int a[], int item, int low, int high) 
+{ 
+    if (high <= low) 
+        return (item > a[low])?  (low + 1): low; 
+  
+    int mid = (low + high)/2; 
+  
+    if(item == a[mid]) 
+        return mid+1; 
+  
+    if(item > a[mid]) 
+        return binarySearch(a, item, mid+1, high); 
+    return binarySearch(a, item, low, mid-1); 
+} 
+  
+// Function to sort an array a[] of size 'n' 
+void insertionSort(int a[], int n) 
+{ 
+    int i, loc, j, k, selected; 
+  
+    for (i = 1; i < n; ++i) 
+    { 
+        j = i - 1; 
+        selected = a[i]; 
+  
+        // find location where selected sould be inseretd 
+        loc = binarySearch(a, selected, 0, j); 
+  
+        // Move all elements after location to create space 
+        while (j >= loc) 
+        { 
+            a[j+1] = a[j]; 
+            j--; 
+        } 
+        a[j+1] = selected; 
+    } 
+} 
+  
+// Driver program to test above function 
+int main() 
+{ 
+    int a[] = {37, 23, 0, 17, 12, 72, 31, 
+              46, 100, 88, 54}; 
+    int n = sizeof(a)/sizeof(a[0]), i; 
+  
+    insertionSort(a, n); 
+  
+    printf("Sorted array: \n"); 
+    for (i = 0; i < n; i++) 
+        printf("%d ",a[i]); 
+  
+    return 0; 
+}