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  1. #include <stdio.h>
  2.  
  3. typedef struct pilha {
  4. 	int m;
  5. 	int vetor[10];
  6. 	int topo;
  7. } pilha;
  8.  
  9.  
  10. void esvazia(struct pilha * pilha) {
  11. 	pilha->topo = 0;
  12. }
  13.  
  14. int push(struct pilha * pilha, int k) {
  15. 	int m = pilha->m;
  16.  
  17. 	if (pilha->topo != m-1) {
  18. 		pilha->topo += 1;
  19. 		pilha->vetor[pilha->topo] = k;
  20. 		printf("push: %d\n", k);
  21. 	} else {
  22. 		printf("Estouro de pilha! m: %d\n", pilha->topo);
  23. 		pilha->topo = 0;
  24. 	}
  25. 	return pilha->vetor[pilha->topo];
  26. }	
  27. /* pop() de pilha vazia dá erro */
  28. int pop(struct pilha * pilha) {
  29. 	int *k = &pilha->vetor[pilha->topo]; 
  30.  
  31. 	if (pilha->topo > 0) {
  32. 		*k = pilha->vetor[pilha->topo];
  33. 		pilha->topo -= 1;
  34. 	} else {
  35. 		k = NULL;
  36. 	} 
  37. 	return *k;
  38. }
  39.  
  40. void exibirPilha (struct pilha * pilha){
  41. 	int i;
  42.  
  43. 	if (pilha->topo == 0) {
  44. 		printf("Pilha vazia!\n");
  45. 	} else {
  46. 		for (i = pilha->topo; i >=1 ; i--) {
  47. 			printf("|%.2d|\n", pilha->vetor[i]);
  48. 		}
  49. 	}
  50. } 
  51.  
  52. int main(void) {
  53.  
  54. 	pilha pilha_01;
  55. 	pilha_01.topo = 0;
  56. 	pilha_01.m = 10;
  57. 	esvazia(&pilha_01);
  58. 	//printf("pop: %d\n", pop(&pilha_01));
  59. 	//pop(&pilha_01);
  60. 	push(&pilha_01, 13);
  61. 	push(&pilha_01, 7);
  62. 	push(&pilha_01, 2);
  63. 	push(&pilha_01, 9);
  64. 	esvazia(&pilha_01);
  65. 	push(&pilha_01, 6);
  66. 	push(&pilha_01, 2);
  67. 	push(&pilha_01, 4);
  68. 	push(&pilha_01, 18);
  69. 	push(&pilha_01, 21);
  70. 	//push(&pilha_01, 3);
  71. 	//push(&pilha_01, 100);
  72. 	//push(&pilha_01, 200);
  73. 	exibirPilha(&pilha_01);
  74. 	//printf("%d\n", pop(&pilha_01));
  75. 	printf("pop: %d\n", pop(&pilha_01));
  76. 	printf("pop: %d\n", pop(&pilha_01));
  77. 	printf("pop: %d\n", pop(&pilha_01));
  78. 	printf("pop: %d\n", pop(&pilha_01));
  79. 	printf("pop: %d\n", pop(&pilha_01));
  80. 	exibirPilha(&pilha_01);
  81.  
  82.  
  83. 	return 0;
  84. }
  85.  
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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Standard input is empty
stdout
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push: 13
push: 7
push: 2
push: 9
push: 6
push: 2
push: 4
push: 18
push: 21
|21|
|18|
|04|
|02|
|06|
pop: 21
pop: 18
pop: 4
pop: 2
pop: 6
Pilha vazia!
https://ideone.com/8QKOpM
Pilha funcional
language:
C99 (gcc 8.3)
created:
12 days ago
visibility:
public

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