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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.     reset();
  19.  
  20.     while(1){
  21.         int n;
  22.         double cal1, cal2;
  23.  
  24.         scanf("%d", &n);
  25.  
  26.         switch(n){
  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.             {
  53.                 double value;
  54.                 scanf("%lf", &value);
  55.                 printf("data:%f\n", value);
  56.                 push(value);
  57.                 break;
  58.             }
  59.  
  60.             case 9:
  61.                 break;
  62.         }
  63.  
  64.         if(n == 9){
  65.             break;
  66.         }
  67.     }
  68.  
  69.     answer();
  70.  
  71.     return 0;
  72. }
  73.  
  74. void push(double value)
  75. {
  76.     if(!isFull()){
  77.         stack[sp] = value;
  78.         sp++;
  79.     }
  80. }
  81.  
  82. double pop(void)
  83. {
  84.     double value;
  85.  
  86.     if(!isEmpty()){
  87.         sp--;
  88.         value = stack[sp];
  89.         return value;
  90.     }
  91.  
  92.     return 0;
  93. }
  94.  
  95. int isFull(void)
  96. {
  97.     if(sp >= SIZE){
  98.         return 1;
  99.     }
  100.     else{
  101.         return 0;
  102.     }
  103. }
  104.  
  105. int isEmpty(void)
  106. {
  107.     if(sp <= 0){
  108.         return 1;
  109.     }
  110.     else{
  111.         return 0;
  112.     }
  113. }
  114.  
  115. void answer(void)
  116. {
  117.     if(!isEmpty()){
  118.         printf("answer:%f\n", pop());
  119.     }
  120. }
  121.  
  122. void reset(void)
  123. {
  124.     sp = 0;
  125. }
  126.  
  127.  
  128.  
Success #stdin #stdout 0s 5316KB
comments (?)
stdin
copy 
5
1
5
2
1
9
stdout
copy 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/SAy3LZ
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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