rest of the codes

StackInLL.c

@@ -0,0 +1,101 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// Node structure
+typedef struct node {
+    int data;
+    struct node *next;
+} NODE;
+
+NODE *top = NULL;
+
+// Push operation
+void push(int value) {
+    NODE *newNode = (NODE*)malloc(sizeof(NODE));
+
+    if (!newNode) {
+        printf("Memory allocation failed!\n");
+        return;
+    }
+
+    newNode->data = value;
+    newNode->next = top;
+    top = newNode;
+
+    printf("Pushed %d onto stack\n", value);
+}
+
+// Pop operation
+int pop() {
+    NODE *temp;
+    int value;
+
+    if (top == NULL) {
+        printf("Stack Underflow! Stack is empty.\n");
+        return -1;
+    }
+
+    temp = top;
+    value = temp->data;
+    top = top->next;
+    free(temp);
+
+    return value;
+}
+
+// Display stack contents
+void display() {
+    NODE *temp = top;
+
+    if (top == NULL) {
+        printf("Stack is empty.\n");
+        return;
+    }
+
+    printf("Stack contents:\n");
+    while (temp != NULL) {
+        printf("%d -> ", temp->data);
+        temp = temp->next;
+    }
+    printf("NULL\n");
+}
+
+// Main menu
+int main() {
+    int choice, value;
+
+    while (1) {
+        printf("\n--- STACK MENU ---\n");
+        printf("1. Push\n");
+        printf("2. Pop\n");
+        printf("3. Display\n");
+        printf("4. Exit\n");
+        printf("Enter choice: ");
+        scanf("%d", &choice);
+
+        switch (choice) {
+        case 1:
+            printf("Enter value to push: ");
+            scanf("%d", &value);
+            push(value);
+            break;
+
+        case 2:
+            value = pop();
+            if (value != -1)
+                printf("Popped value: %d\n", value);
+            break;
+
+        case 3:
+            display();
+            break;
+
+        case 4:
+            printf("Exiting...\n");
+            exit(0);
+
+        default:
+            printf("Invalid choice. Try again.\n");
+        }
+    }
+}