Sorted Insertion Program

Linked Lists/Single LL/sortedInsertion.cpp

@@ -0,0 +1,92 @@
+/* Program to insert in a sorted list */
+#include <bits/stdc++.h> 
+using namespace std; 
+
+/* Link list node */
+class Node { 
+public: 
+	int data; 
+	Node* next; 
+}; 
+
+/* function to insert a new_node 
+in a list. Note that this 
+function expects a pointer to 
+head_ref as this can modify the 
+head of the input linked list 
+(similar to push())*/
+void sortedInsert(Node** head_ref, 
+				Node* new_node) 
+{ 
+	Node* current; 
+	/* Special case for the head end */
+	if (*head_ref == NULL 
+		|| (*head_ref)->data 
+			>= new_node->data) { 
+		new_node->next = *head_ref; 
+		*head_ref = new_node; 
+	} 
+	else { 
+		/* Locate the node before the 
+point of insertion */
+		current = *head_ref; 
+		while (current->next != NULL 
+&& current->next->data 
+< new_node->data) { 
+			current = current->next; 
+		} 
+		new_node->next = current->next; 
+		current->next = new_node; 
+	} 
+} 
+
+/* BELOW FUNCTIONS ARE JUST 
+UTILITY TO TEST sortedInsert */
+
+/* A utility function to 
+create a new node */
+Node* newNode(int new_data) 
+{ 
+	/* allocate node */
+	Node* new_node = new Node(); 
+
+	/* put in the data */
+	new_node->data = new_data; 
+	new_node->next = NULL; 
+
+	return new_node; 
+} 
+
+/* Function to print linked list */
+void printList(Node* head) 
+{ 
+	Node* temp = head; 
+	while (temp != NULL) { 
+		cout << temp->data << " "; 
+		temp = temp->next; 
+	} 
+} 
+
+/* Driver program to test count function*/
+int main() 
+{ 
+	/* Start with the empty list */
+	Node* head = NULL; 
+	Node* new_node = newNode(5); 
+	sortedInsert(&head, new_node); 
+	new_node = newNode(10); 
+	sortedInsert(&head, new_node); 
+	new_node = newNode(7); 
+	sortedInsert(&head, new_node); 
+	new_node = newNode(3); 
+	sortedInsert(&head, new_node); 
+	new_node = newNode(1); 
+	sortedInsert(&head, new_node); 
+	new_node = newNode(9); 
+	sortedInsert(&head, new_node); 
+	cout << "Created Linked List\n"; 
+	printList(head); 
+
+	return 0; 
+} 
+// This is code is contributed by rathbhupendra