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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.     int menu;
  17.     double value;
  18.     double cal1, cal2;
  19.  
  20.     reset();
  21.  
  22.     while (1) {
  23.         scanf("%d", &menu);
  24.  
  25.         switch (menu) {
  26.  
  27.         case 1:
  28.             cal2 = pop();
  29.             cal1 = pop();
  30.             push(cal1 + cal2);
  31.             break;
  32.  
  33.         case 2:
  34.             cal2 = pop();
  35.             cal1 = pop();
  36.             push(cal1 - cal2);
  37.             break;
  38.  
  39.         case 3:
  40.             cal2 = pop();
  41.             cal1 = pop();
  42.             push(cal1 * cal2);
  43.             break;
  44.  
  45.         case 4:
  46.             cal2 = pop();
  47.             cal1 = pop();
  48.             push(cal1 / cal2);
  49.             break;
  50.  
  51.         case 5:
  52.             scanf("%lf", &value);
  53.             printf("data:%f\n", value);
  54.             push(value);
  55.             break;
  56.  
  57.         case 9:
  58.             break;
  59.         }
  60.  
  61.         if (menu == 9) {
  62.             break;
  63.         }
  64.     }
  65.  
  66.     answer();
  67.  
  68.     return 0;
  69. }
  70.  
  71. void push(double value)
  72. {
  73.     if (isFull() == 0) {
  74.         stack[sp] = value;
  75.         sp++;
  76.     }
  77. }
  78.  
  79. double pop(void)
  80. {
  81.     double value;
  82.  
  83.     if (isEmpty() == 0) {
  84.         sp--;
  85.         value = stack[sp];
  86.         return value;
  87.     }
  88.  
  89.     return 0;
  90. }
  91.  
  92. int isFull(void)
  93. {
  94.     if (sp == SIZE) {
  95.         return 1;
  96.     }
  97.  
  98.     return 0;
  99. }
  100.  
  101. int isEmpty(void)
  102. {
  103.     if (sp == 0) {
  104.         return 1;
  105.     }
  106.  
  107.     return 0;
  108. }
  109.  
  110. void answer(void)
  111. {
  112.     printf("answer:%f\n", stack[sp - 1]);
  113. }
  114.  
  115. void reset(void)
  116. {
  117.     sp = 0;
  118. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin
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5
1
5
2
1
9
stdout
copy 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/A99WVg
language:
C (gcc 8.3)
created:
9 hours ago
visibility:
public

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