formatting filenames d7af6fdc8c

hashing/chaining.cpp

@@ -0,0 +1,140 @@
+#include <iostream>
+#include <math.h>
+using namespace std;
+
+struct Node
+{
+	int data;
+	struct Node *next;
+} * head[100], *curr;
+
+void init()
+{
+	for (int i = 0; i < 100; i++)
+		head[i] = NULL;
+}
+
+void add(int x, int h)
+{
+	struct Node *temp = new Node;
+	temp->data = x;
+	temp->next = NULL;
+	if (!head[h])
+	{
+		head[h] = temp;
+		curr = head[h];
+	}
+	else
+	{
+		curr = head[h];
+		while (curr->next)
+			curr = curr->next;
+		curr->next = temp;
+	}
+}
+
+void display(int mod)
+{
+	struct Node *temp;
+	int i;
+	for (i = 0; i < mod; i++)
+	{
+		if (!head[i])
+		{
+			cout << "Key " << i << " is empty" << endl;
+		}
+		else
+		{
+			cout << "Key " << i << " has values = ";
+			temp = head[i];
+			while (temp->next)
+			{
+				cout << temp->data << " ";
+				temp = temp->next;
+			}
+			cout << temp->data;
+			cout << endl;
+		}
+	}
+}
+
+int hash(int x, int mod)
+{
+	return x % mod;
+}
+
+void find(int x, int h)
+{
+	struct Node *temp = head[h];
+	if (!head[h])
+	{
+		cout << "Element not found";
+		return;
+	}
+	while (temp->data != x && temp->next)
+		temp = temp->next;
+	if (temp->next)
+		cout << "Element found";
+	else
+	{
+		if (temp->data == x)
+			cout << "Element found";
+		else
+			cout << "Element not found";
+	}
+}
+
+int main(void)
+{
+	init();
+	int c, x, mod, h;
+	cout << "Enter the size of Hash Table. = ";
+	cin >> mod;
+	bool loop = true;
+	while (loop)
+	{
+		cout << endl;
+		cout << "PLEASE CHOOSE -" << endl;
+		cout << "1. Add element." << endl;
+		cout << "2. Find element." << endl;
+		cout << "3. Generate Hash." << endl;
+		cout << "4. Display Hash table." << endl;
+		cout << "5. Exit." << endl;
+		cin >> c;
+		switch (c)
+		{
+		case 1:
+			cout << "Enter element to add = ";
+			cin >> x;
+			h = hash(x, mod);
+			h = fabs(h);
+			add(x, h);
+			break;
+		case 2:
+			cout << "Enter element to search = ";
+			cin >> x;
+			h = hash(x, mod);
+			find(x, h);
+			break;
+		case 3:
+			cout << "Enter element to generate hash = ";
+			cin >> x;
+			cout << "Hash of " << x << " is = " << hash(x, mod);
+			break;
+		case 4:
+			display(mod);
+			break;
+		default:
+			loop = false;
+			break;
+		}
+		cout << endl;
+	}
+	/*add(1,&head1);
+	add(2,&head1);
+	add(3,&head2);
+	add(5,&head1);
+	display(&head1);
+	display(&head2);*/
+	return 0;
+}