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  1.  
  2. #include <stdio.h>
  3.  
  4. #define SIZE 10
  5.  
  6. double stack[SIZE];
  7. int sp;
  8.  
  9.  
  10. void push(double value);
  11. double pop(void);
  12. int isFull(void);
  13. int isEmpty(void);
  14. void answer(void);
  15. void reset(void);
  16.  
  17. int main(void)
  18. {
  19.     int op;
  20.     double a, b, value;
  21.  
  22.     reset();
  23.  
  24.     while(1) {
  25.  
  26.         scanf("%d", &op);
  27.  
  28.         if(op == 9) {
  29.             break;
  30.         }
  31.  
  32.         switch(op) {
  33.  
  34.  
  35.             case 1:
  36.                 b = pop();
  37.                 a = pop();
  38.                 push(a + b);
  39.                 break;
  40.  
  41.  
  42.             case 2:
  43.                 b = pop();
  44.                 a = pop();
  45.                 push(a - b);
  46.                 break;
  47.  
  48.  
  49.             case 3:
  50.                 b = pop();
  51.                 a = pop();
  52.                 push(a * b);
  53.                 break;
  54.  
  55.  
  56.             case 4:
  57.                 b = pop();
  58.                 a = pop();
  59.                 push(a / b);
  60.                 break;
  61.  
  62.  
  63.             case 5:
  64.                 scanf("%lf", &value);
  65.                 push(value);
  66.                 break;
  67.         }
  68.     }
  69.  
  70.     answer();
  71.  
  72.     return 0;
  73. }
  74.  
  75.  
  76. void push(double value)
  77. {
  78.     if(isFull() == 1) {
  79.         return;
  80.     }
  81.     else {
  82.         stack[sp] = value;
  83.         sp++;
  84.         printf("data:%f\n", value);
  85.     }
  86. }
  87.  
  88.  
  89. double pop(void)
  90. {
  91.     if(isEmpty() == 1) {
  92.         return 0;
  93.     }
  94.     else {
  95.         sp--;
  96.         return stack[sp];
  97.     }
  98. }
  99.  
  100.  
  101. int isFull(void)
  102. {
  103.     if(sp == SIZE) {
  104.         return 1;
  105.     }
  106.     else {
  107.         return 0;
  108.     }
  109. }
  110.  
  111.  
  112. int isEmpty(void)
  113. {
  114.     if(sp == 0) {
  115.         return 1;
  116.     }
  117.     else {
  118.         return 0;
  119.     }
  120. }
  121.  
  122.  
  123. void answer(void)
  124. {
  125.     printf("answer:%f\n", pop());
  126. }
  127.  
  128. void reset(void)
  129. {
  130.     sp = 0;
  131. }
  132.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
5
1
5
2
1
9
stdout
copy 
data:1.000000
data:2.000000
data:3.000000
answer:3.000000
https://ideone.com/lytLSk
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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