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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct Node {
  5.     int data;
  6.     struct Node* next;
  7. } Stack;
  8.  
  9. Stack* createNode(int value) {
  10.     Stack* head = (Stack*)malloc(sizeof(Stack));
  11.     if (head == NULL) {
  12.         printf("Memory allocation failed\n");
  13.         exit(1);
  14.     }
  15.     head->data = value;
  16.     head->next = NULL;
  17.     return head;
  18. }
  19.  
  20. Stack* push(Stack* top, int value) {
  21.     Stack* temp = createNode(value);
  22.     temp->next = top;
  23.     return temp;
  24. }
  25.  
  26. Stack* pop(Stack* top) {
  27.     if (top == NULL) {
  28.         printf("Stack is Empty\n");
  29.         return top;
  30.     }
  31.     printf("Element popped is %d\n", top->data);
  32.     Stack* temp = top;
  33.     top = top->next;
  34.     free(temp);
  35.     return top;
  36. }
  37.  
  38. void peek(Stack* top) {
  39.     if (top == NULL) {
  40.         printf("Empty\n");
  41.         return;
  42.     }
  43.     printf("%d\n", top->data);
  44. }
  45.  
  46. void traverse(Stack* top) {
  47.     if (top == NULL) {
  48.         printf("Stack is empty\n");
  49.         return;
  50.     }
  51.     printf("Elements in the stack are:\n");
  52.     Stack* ptr = top;
  53.     while (ptr != NULL) {
  54.         printf("%d\n", ptr->data);
  55.         ptr = ptr->next;
  56.     }
  57. }
  58.  
  59. int main() {
  60.     Stack* top = NULL;
  61.     top = push(top, 23);
  62.     top = push(top, 24);
  63.     top = push(top, 25);
  64.  
  65.     traverse(top);
  66.  
  67.     top = pop(top);
  68.     top = pop(top);
  69.  
  70.     peek(top);
  71.     traverse(top);
  72.  
  73.     return 0;
  74. }
  75.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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Elements in the stack are:
25
24
23
Element popped is 25
Element popped is 24
23
Elements in the stack are:
23
https://ideone.com/6wG8RH
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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