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  1. #include <stdio.h>
  2.  
  3. #define SIZE 10
  4.  
  5. double stack[SIZE];
  6. int sp;
  7.  
  8. void push(double value);
  9. double pop(void);
  10. int isFull(void);
  11. int isEmpty(void);
  12. void answer(void);
  13. void reset(void);
  14.  
  15. int main(void)
  16. {
  17.     int n;
  18.     double a, b, x;
  19.  
  20.     reset();
  21.  
  22.     while(1){
  23.         scanf("%d", &n);
  24.         if(n == 9){
  25.         	break;
  26.  
  27.         }
  28.  
  29.         switch(n){
  30.             case 1:
  31.                 b = pop();
  32.                 a = pop();
  33.                 push(a + b);
  34.                 break;
  35.  
  36.             case 2:
  37.                 b = pop();
  38.                 a = pop();
  39.                 push(a - b);
  40.                 break;
  41.  
  42.             case 3:
  43.                 b = pop();
  44.                 a = pop();
  45.                 push(a * b);
  46.                 break;
  47.  
  48.             case 4:
  49.                 b = pop();
  50.                 a = pop();
  51.                 push(a / b);
  52.                 break;
  53.  
  54.             case 5:
  55.                 scanf("%lf", &x);
  56.                 push(x);
  57.                 printf("data:%f\n", x);
  58.                 break;
  59.  
  60.  
  61.         }
  62.  
  63.     }
  64.  
  65.     answer();
  66.  
  67.     return 0;
  68. }
  69.  
  70. void push(double value)
  71. {
  72.     if(isFull() == 0){
  73.         stack[sp++] = value;
  74.     }
  75. }
  76.  
  77. double pop(void)
  78. {
  79.     if(isEmpty() == 0){
  80.         return stack[--sp];
  81.     }
  82.     return 0;
  83. }
  84.  
  85. int isFull(void)
  86. {
  87.     if(sp >= SIZE){
  88.         return 1;
  89.     }
  90.     return 0;
  91. }
  92.  
  93. int isEmpty(void)
  94. {
  95.     if(sp <= 0){
  96.         return 1;
  97.     }
  98.     return 0;
  99. }
  100.  
  101. void answer(void)
  102. {
  103.     printf("answer:%f\n", pop());
  104. }
  105.  
  106. void reset(void)
  107. {
  108.     sp = 0;
  109. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
5
8
5
2
1
1
9
stdout 
data:8.000000
data:2.000000
answer:10.000000
https://ideone.com/9vjQbu
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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