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  1. #include<stdio.h>
  2.  
  3. #define SIZE 10
  4. double stack[SIZE];
  5. int sp;
  6.  
  7. void push(double value);
  8. double pop(void);
  9. int isFull(void);
  10. int isEmpty(void);
  11. void answer(void);
  12. void reset(void);
  13.  
  14. int main(void)
  15. {
  16. 	sp=0;
  17. 	int resp,a,b;
  18. 	double data;
  19.  
  20.    while(1){
  21. 		scanf("%d",&resp);
  22.  
  23. 		if(!resp) break;
  24.  
  25. 		switch(resp){
  26. 			case 1:
  27. 				pop();
  28. 				pop();
  29. 				data=stack[sp]+stack[sp+1];
  30. 				push(data);
  31. 				break;
  32. 			case 2:
  33. 				pop();
  34. 				pop();
  35. 				data=stack[sp]-stack[sp+1];
  36. 				push(data);
  37. 				break;
  38. 			case 3:
  39. 				pop();
  40. 				pop();
  41. 				data=stack[sp]*stack[sp+1];
  42. 				push(data);
  43. 				break;
  44. 			case 4:
  45. 				pop();
  46. 				pop();
  47. 				data=stack[sp]/stack[sp+1];
  48. 				push(data);
  49. 				break;
  50. 			case 5:
  51. 				scanf("%lf",&data);
  52. 				printf("data:%lf\n",data);
  53. 				push(data);
  54. 				break;
  55. 			case 9:
  56. 				resp=0;
  57. 				break;
  58. 		}
  59.    }
  60.    answer();
  61.    reset();
  62.    return 0;
  63. }
  64.  
  65. double pop(void)
  66. {
  67. 	if(isEmpty()){
  68. 		printf("スタックが空で取り出せませんでした\n");
  69. 		return 0;
  70. 	}else{
  71. 		return stack[sp--];
  72. 	}
  73. }
  74.  
  75. void push(double value)
  76. {
  77. 	if(isFull()){
  78. 		printf("スタックが満杯で入りませんでした\n");
  79. 	}else{
  80. 		stack[sp]=value;
  81. 		sp++;
  82. 	}
  83. }
  84.  
  85. int isFull(void)
  86. {
  87. 	if(sp>=SIZE){
  88. 		return 1;
  89. 	}else{
  90. 		return 0;
  91. 	}
  92. }
  93.  
  94. int isEmpty(void)
  95. {
  96. 	if(sp<=0){
  97. 		return 1;
  98. 	}else{
  99. 		return 0;
  100. 	}
  101. }
  102.  
  103. void answer(void)
  104. {
  105. 	pop();
  106. 	printf("answer:%lf",stack[sp--]);
  107. }
  108.  
  109. void reset()
  110. {
  111. 	sp=0;
  112. }
Success #stdin #stdout 0s 5276KB
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stdin
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5
1
5
2
1
9
stdout
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data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/admmxz
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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