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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3.  
  4. struct data {
  5.   char key;
  6.   struct data *next;
  7. };
  8.  
  9. void push(struct data **top, char key);
  10. char pop(struct data **top);
  11. void print_stack_list(struct data *top);
  12.  
  13. int main() {
  14.   struct data *top;
  15.   top = NULL;
  16.  
  17.   push(&top, 'a');
  18.  
  19.   print_stack_list(top);
  20.   printf("\n");
  21.  
  22.   push(&top, 'b');
  23.  
  24.   print_stack_list(top);
  25.   printf("\n");
  26.  
  27.   pop(&top);
  28.  
  29.   print_stack_list(top);
  30.   printf("\n");
  31.  
  32.   pop(&top);
  33.  
  34.   return 0;
  35. }
  36.  
  37. void push(struct data **top, char key) {
  38.   struct data *d;
  39.   d = (struct data *) malloc(sizeof(struct data));
  40.   d->key = key;
  41.   d->next = *top;
  42.   *top = d;
  43. }
  44.  
  45. char pop(struct data **top) {
  46.   int key;
  47.   struct data *d;
  48.   key = (*top)->key;
  49.   d = *top;
  50.   *top = (*top)->next;
  51.   free(d);
  52.   return key;
  53. }
  54.  
  55. void print_stack_list(struct data *top) {
  56.   while (top != NULL) {
  57.     printf("%c\n",top->key);
  58.     top = top->next;
  59.   }
  60. }
Success #stdin #stdout 0.01s 1852KB
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stdin
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Standard input is empty
stdout
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a

b
a

a
https://ideone.com/PLIcx
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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