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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct list{
  5. 	char element;
  6. 	struct list * node;
  7. } list;
  8.  
  9. int push(char data, list **ptr);
  10. char pop(list **ptr);
  11.  
  12. int push(char data, list **ptr){
  13. 	list * tmp;
  14. 	if( (tmp = malloc(sizeof(list))) == NULL ){
  15. 		fputs("Memory allocation error!\n", stderr);
  16. 		exit(1);
  17. 	}	
  18. 	tmp->node = (*ptr)->node;
  19. 	tmp->element = data;
  20. 	(*ptr)->node = tmp;
  21. 	return 0;
  22. }
  23.  
  24. char pop(list **ptr){
  25. 	if( (*ptr)->node != NULL ){
  26. 		char tmp;
  27. 		list * temp = (*ptr)->node;
  28. 		tmp = (*ptr)->node->element;
  29. 		(*ptr)->node = (*ptr)->node->node;
  30. 		free(temp);
  31. 		return tmp;
  32. 	} else {
  33. 		printf("\nMismatched pop!\n"); 
  34. 		exit(0); //Not a program error..
  35. 	}
  36. }
  37.  
  38. int main(){
  39. 	list * head;
  40. 	head = malloc(sizeof(list));
  41.  
  42. 	int i;
  43.  
  44. 	for(i = 0;i <= 10; i++)
  45. 		push(i, &head);
  46. 	for(i = 0;i <= 10; i++)
  47. 		printf("%di: %d\n",i,pop(&head));
  48. 	return 0;
  49. }
Success #stdin #stdout 0.02s 1852KB
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stdin
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Standard input is empty
stdout
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0i: 10
1i: 9
2i: 8
3i: 7
4i: 6
5i: 5
6i: 4
7i: 3
8i: 2
9i: 1
10i: 0
https://ideone.com/FlXGi
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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