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  1. typedef int Elem;
  2.  
  3. typedef struct stos {
  4.   Elem* e;
  5.   struct stos *next;
  6. } Stos;
  7.  
  8. #include <stdio.h>
  9. #include <stdlib.h>
  10.  
  11. Elem* pop(Stos **s) {
  12.     if (*s==NULL) exit(EXIT_FAILURE);
  13.     Stos* help = *s;
  14.     Elem* e = help->e;
  15.     *s = (*s)->next;
  16.     free(help);
  17.     return e;
  18. }
  19.  
  20. void push(Stos **ss, Elem* elem) {
  21.    Stos *help;
  22.    help = (Stos *)malloc(sizeof(Stos));
  23.    help->e = elem;
  24.    help->next = *ss;
  25.    *ss = help;
  26. }
  27.  
  28.  
  29.  
  30.  
  31. int main()
  32. {
  33.     	Stos *s = NULL;
  34.     	int *a = (int*)malloc(sizeof(int));
  35.     	*a=10;
  36.         push(&s, a);
  37.         a=(int*)malloc(sizeof(int));
  38.         *a=12;
  39.         push(&s, a);
  40.         a=(int*)malloc(sizeof(int));
  41.         *a=14;
  42.         push(&s, a);
  43.  
  44.         a = pop(&s);
  45.         printf("%d\n", *a);
  46.         free(a);
  47.         a = pop(&s);
  48.         printf("%d\n", *a);
  49.         free(a);
  50.         a = pop(&s);
  51.         printf("%d\n", *a);
  52.         free(a);
  53.         return 0;
  54. }
  55.  
Success #stdin #stdout 0s 1852KB
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14
12
10
https://ideone.com/R9Anc
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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