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  1. #include <stdio.h>
  2. #define SIZE 10
  3. double stuck[SIZE];
  4. int sp,resp;
  5. double value;
  6. void push(double value);
  7. double pop(void);
  8. int isFull(void);
  9. int isEmpty(void);
  10. void answer(void);
  11. void reset(void);
  12. int main(void)
  13. {
  14. 	reset();
  15. 	while(1)
  16. 	{
  17. 		if(scanf("%d",&resp) !=1||!resp) break;
  18. 		double a,b;
  19.  
  20. 		switch(resp)
  21. 		{
  22. 			case 1:
  23. 			value=pop()+pop();
  24. 			push(value);
  25. 			break;
  26. 			case 2:
  27. 			b=pop();
  28. 			a=pop();
  29. 			value=a-b;
  30. 			push(value);
  31. 			break;
  32. 			case 3:
  33. 			value=pop()*pop();
  34. 			push(value);
  35. 			break;
  36. 			case 4:
  37. 			b=pop();
  38. 			a=pop();
  39. 			value=a/b;
  40. 			push(value);
  41. 			break;
  42. 			case 5:
  43. 			scanf("%lf",&value);
  44. 			printf("data:%lf\n",value);
  45. 			push(value);
  46. 			break;
  47. 			case 9:
  48. 			answer();
  49. 			break;
  50. 		}
  51. 	}
  52. }
  53.  
  54. void push(double data)
  55. {
  56. 	if(isFull()) return;
  57. 	stuck[sp++]=data;
  58. }
  59. double pop(void)
  60. {
  61. 	if(isEmpty()) return 0.0;
  62. 	return stuck[--sp];
  63. }
  64. int isFull(void)
  65. {
  66. 	if(sp>=SIZE)
  67. 	{
  68. 		printf("スタックが満杯で入りませんでした\n");
  69. 		return 1;
  70. 	}
  71. 	return 0;
  72. }
  73. int isEmpty(void)
  74. {
  75. 	if(sp<=0)
  76. 	{
  77. 		printf("スタックがカラで取り出せませんでした。\n");
  78. 		return 1;
  79. 	}
  80. 	return 0;
  81. }
  82. void answer(void)
  83. {
  84. 	if(sp<=0)
  85. 	{
  86. 		printf("sTACがカラです。\n");
  87. 		return;
  88. 	}
  89. 	printf("answer:%lf\n",stuck[sp-1]);
  90. }
  91. void reset(void)
  92. {
  93. 	for(int i=0;i<SIZE;i++)
  94. 	{
  95. 		stuck[i]=0;
  96. 	}
  97. 	sp=0;
  98. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
5
1
5
2
1
9
stdout 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/yg8BSI
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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