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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.  	reset();
  17. 	int a,b,t=0;
  18. 	double x;
  19. 	int data;
  20. 		while(t==0){
  21. 			scanf("%d",&data);
  22. 		switch(data){
  23.        case 1:
  24. 				a=pop();
  25. 				b=pop(); 
  26. 				x=a+b;
  27. 				push(x);
  28. 				printf("data;%lf\n",x);
  29. 				break;
  30. 		case 2:
  31. 				a=pop();
  32. 				b=pop(); 
  33. 				x=a-b;
  34. 				push(x);
  35. 				printf("data;%lf\n",x);
  36. 				break;	
  37. 		case 3: 
  38. 				a=pop();
  39. 				b=pop(); 
  40. 				x=a*b;
  41. 				push(x);
  42. 				break;
  43. 		case 4:
  44. 				a=pop();
  45. 				b=pop();
  46. 			if (b == 0) {
  47.                     printf("計算不可能。\n");
  48.                      break;
  49.                 } 
  50. 			else{
  51. 						x=a/b;
  52. 						push(x);
  53. 						printf("data;%lf\n",x);
  54. 						break;
  55. 			}
  56. 		case 5:
  57. 						scanf("%lf",&x);
  58. 						push(x);
  59. 						printf("data;%lf\n",x);
  60. 						break;
  61. 		case 9:
  62. 					   answer();
  63. 						t=1;
  64. 						break;
  65. 				}
  66. 		} 
  67.     return 0;
  68. }
  69.  
  70. void push(double value)
  71. {
  72. if(isFull()){
  73. printf("スタックは満杯です\n");
  74. }
  75. else{
  76. 		stack[sp]=value;
  77. 				sp++;
  78. 		}
  79. 	}
  80. double pop(void){
  81. 	if(isEmpty()){
  82. 			printf("スタックは空\n");
  83. 		}
  84. 	else{
  85. 					sp--;
  86. 					stack[sp];
  87. 		}
  88. 				return stack[sp];
  89. 	}
  90. int isFull(void) {
  91.     return sp >= SIZE;
  92. }
  93.  
  94. int isEmpty(void) {
  95.     return sp <= 0;
  96. }
  97. void answer(void) {
  98.       int x;
  99.     if (isEmpty()) {
  100.         printf("スタックが空です。\n");
  101.     }
  102. 	 else {	
  103.           x=pop();
  104. 			printf("answer: %lf\n",x) ;
  105.     }
  106. }
  107. void reset(void)
  108. {
  109. sp=0;
  110. }
  111.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
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5
1
5
2
1
9
stdout
copy 
data;1.000000
data;2.000000
data;3.000000
answer: 3.000000
https://ideone.com/5LDvPc
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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