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  1.  
  2. #include <stdio.h>
  3.  
  4. #define SIZE 10
  5.  
  6. double stack[SIZE];
  7. int sp;
  8.  
  9. void push(double value);
  10. double pop(void);
  11. int isFull(void);
  12. int isEmpty(void);
  13. void answer(void);
  14. void reset(void);
  15.  
  16. int main(void)
  17. {
  18.     int select;
  19.     double data, cal1, cal2;
  20.  
  21.     reset();
  22.  
  23.     while (1) {
  24.         if (scanf("%d", &select) != 1) {
  25.             break;
  26.         }
  27.  
  28.         if (select == 9) {
  29.             break;
  30.         }
  31.  
  32.         switch (select) {
  33.             case 1:
  34.                 cal1 = pop();
  35.                 cal2 = pop();
  36.                 push(cal2 + cal1);
  37.                 break;
  38.  
  39.             case 2:
  40.                 cal1 = pop();
  41.                 cal2 = pop();
  42.                 push(cal2 - cal1);
  43.                 break;
  44.  
  45.             case 3:
  46.                 cal1 = pop();
  47.                 cal2 = pop();
  48.                 push(cal2 * cal1);
  49.                 break;
  50.  
  51.             case 4:
  52.                 cal1 = pop();
  53.                 cal2 = pop();
  54.                 push(cal2 / cal1);
  55.                 break;
  56.  
  57.             case 5:
  58.                 scanf("%lf", &data);
  59.                 printf("data:%f\n", data);
  60.                 push(data);
  61.                 break;
  62.         }
  63.     }
  64.  
  65.     answer();
  66.  
  67.     return 0;
  68. }
  69.  
  70. void push(double value)
  71. {
  72.     if (!isFull()) {
  73.         stack[sp] = value;
  74.         sp++;
  75.     }
  76. }
  77.  
  78. double pop(void)
  79. {
  80.     if (!isEmpty()) {
  81.         sp--;
  82.         return stack[sp];
  83.     }
  84.     return 0;
  85. }
  86.  
  87. int isFull(void)
  88. {
  89.     return sp == SIZE;
  90. }
  91.  
  92. int isEmpty(void)
  93. {
  94.     return sp == 0;
  95. }
  96.  
  97. void answer(void)
  98. {
  99.     if (!isEmpty()) {
  100.         printf("\nanswer:%f\n", pop());
  101.     }
  102. }
  103.  
  104. void reset(void)
  105. {
  106.     sp = 0;
  107. }
  108.  
Success #stdin #stdout 0s 5292KB
comments (?)
stdin 
5
1
5
2
1
9
stdout 
data:1.000000
data:2.000000

answer:3.000000
https://ideone.com/w8YIw0
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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