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  1. #include<stdio.h>
  2.  
  3. #define SIZE 5
  4. int stack[SIZE];
  5. int sp;
  6.  
  7. void push(int value);
  8. int pop(void);
  9.  
  10. int main(void)
  11. {
  12. 	sp=0;
  13. 	int resp,data;
  14.  
  15. 	while(1)
  16. 	{
  17. 		scanf("%d",&resp);
  18. 		if(resp==0)
  19. 		break;
  20.  
  21. 		switch(resp)
  22. 		{
  23. 			case 1:scanf("%d",&data);
  24. 			       push(data);
  25. 			       break;
  26. 			case 2:pop();
  27. 			       break;
  28. 		}
  29. 		printf("sp=%d\n",sp);
  30. 	}
  31. 	printf("\n");
  32. 	for(int i=0;i<sp;i++)
  33. 	{
  34. 		printf("stack[%d]=%d\n",i,stack[i]);
  35. 	}
  36. 	return 0;
  37. }
  38.  
  39. void push(int value)
  40. {
  41. 	if(sp>=SIZE)
  42. 	{
  43. 		printf("NOT");
  44. 	}
  45. 	else
  46. 	{
  47. 		stack[sp++]=value;
  48. 	}
  49. }
  50.  
  51. int pop(void)
  52. {
  53. 	if(sp<=0)
  54. 	{
  55. 		printf("not");
  56. 		return 0;
  57. 	}
  58. 	else
  59. 	{
  60. 		return stack[--sp];
  61. 	}
  62. }
  63.  
Success #stdin #stdout 0.01s 5516KB
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stdin
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1
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stdout
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sp=1
sp=2

stack[0]=2
stack[1]=3
https://ideone.com/Hh3APh
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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