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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.  
  18.   while(1){
  19.     int resp;
  20.     double x, a1, a2;
  21. 	scanf("%d",&resp);
  22.  
  23.     switch(resp){
  24.       case 1:
  25.         if(!isEmpty()){
  26.           x = pop() + pop();
  27.           push(x);
  28.         }
  29.         break;
  30.       case 2:
  31.         if(!isEmpty()){
  32.           a1=pop(); a2=pop();
  33.           x = a2 - a1;
  34.           push(x);
  35.         }
  36.         break;
  37.       case 3:
  38.         if(!isEmpty()){
  39.           x = pop() * pop();
  40.           push(x);
  41.         }
  42.         break;
  43.       case 4:
  44.         if(!isEmpty()){
  45.           a1=pop(); a2=pop();
  46.           x = a2 / a1;
  47.           push(x);
  48.         }
  49.         break;
  50.       case 5:
  51.         scanf("%lf",&x);
  52.         printf("data:%lf\n",x);
  53.         push(x);
  54.         break;
  55.       case 9:
  56.     	answer();
  57.         return 0;
  58.     }
  59.   }
  60.  
  61.   answer();
  62.  
  63.   return 0;
  64. }
  65.  
  66. void push(double value)
  67. {
  68.   if( isFull() ){
  69.     printf("スタックが満杯で入りませんでした\n");
  70.   }else{
  71.     stack[sp++] = value;
  72.   }
  73. }
  74.  
  75. double pop(void)
  76. {
  77.   if( isEmpty() ){
  78.     printf("スタックが空で取り出せませんでした\n");
  79.     return 0;
  80.   }else{
  81.     return stack[--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.   if(!isEmpty())
  106. 	printf("answer:%lf",pop());
  107. }
  108.  
  109. void reset(void)
  110. {
  111.   sp = 0;
  112. }
  113.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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5 2 5 1 2 9
stdout
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data:2.000000
data:1.000000
answer:1.000000
https://ideone.com/qpKP5i
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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