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  1. #include<stdio.h>
  2.  
  3. #define SIZE 10
  4. double stack[SIZE];
  5. int sp=0;
  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.  
  18.  
  19.  while(1)
  20.  {
  21. 	int a;
  22. 	scanf("%d",&a);
  23.  	double b;
  24.  	switch(a){
  25. 		case 1: if(sp<=0){
  26. 					isEmpty();
  27. 				}else{ 
  28.  					stack[sp++]=pop()+pop();
  29.  				}
  30.  				break;
  31.  		case 2: if(sp<=0){
  32.  	 				isEmpty();
  33.  				}else{ 
  34.  					stack[sp++]=pop()-pop();
  35.  				}
  36.  				break;
  37.  		case 3: if(sp<=0){
  38.  					isEmpty();
  39.  				}else{ 
  40.  					stack[sp++]=pop()*pop();
  41.  				}
  42.  				break;
  43.  		case 4: if(sp<=0){
  44. 				 	isEmpty();
  45.  				}else{
  46. 				 	 stack[sp++]=pop()/pop();
  47.  				}
  48.  				break;
  49.  		case 5: if(sp==SIZE){
  50.  					isFull();
  51.  				}else{
  52. 				 	scanf("%f",&b);
  53.  					push(b);
  54.  				}
  55.  				printf("%f\n",stack[0]);
  56.  				break;
  57.  		case 9:	break;
  58.  	}
  59.  
  60. 	if(a==9)break;
  61.   }
  62.  
  63.   answer();
  64.  
  65.   return 0;
  66. }
  67.  
  68. void push(double value)
  69. {
  70.  stack[sp++]=value;
  71.  
  72. }
  73.  
  74. double pop(void)
  75. {
  76. sp--;
  77. return stack[sp];
  78. }
  79.  
  80. int isFull(void)
  81. {
  82. if(sp>=SIZE)
  83. {
  84. 	printf("スタックが満杯で入りませんでした\n");
  85. }
  86. }
  87.  
  88. int isEmpty(void)
  89. {
  90. if(sp<=0)
  91. {
  92. 	printf("スタックが空で取り出せませんでした\n");	
  93. }
  94. }
  95.  
  96. void answer(void)
  97. {
  98. printf("%f",stack[sp--]);
  99. }
  100.  
  101. void reset(void)
  102. {
  103. int i;
  104. for(i=SIZE;i>=0;i--)
  105. {
  106. stack[i]=0;	
  107. }
  108. }
  109.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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5
1
5
2
1
9
stdout
copy 
0.000000
0.000000
0.000000
https://ideone.com/3ruJRq
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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