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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 select;
  18.     double data;
  19.  
  20.     reset();
  21.     printf("1:+ 2:- 3:* 4:/ 5:data 9:answer\n");
  22.     while(1){
  23.         scanf("%d", &select);
  24.  
  25.         switch(select){
  26.             case 1:
  27.             {
  28.                 double b = pop();
  29.                 double a = pop();
  30.                 push(a + b);
  31.                 break;
  32.             }
  33.  
  34.             case 2:
  35.             {
  36.                 double b = pop();
  37.                 double a = pop();
  38.                 push(a - b);
  39.                 break;
  40.             }
  41.  
  42.             case 3:
  43.             {
  44.                 double b = pop();
  45.                 double a = pop();
  46.                 push(a * b);
  47.                 break;
  48.             }
  49.  
  50.             case 4:
  51.             {
  52.                 double b = pop();
  53.                 double a = pop();
  54.                 push(a / b);
  55.                 break;
  56.             }
  57.  
  58.             case 5:
  59.                 scanf("%lf", &data);
  60.                 push(data);
  61.                 break;
  62.  
  63.             case 9:
  64.                 answer();
  65.                 return 0;
  66.         }
  67.     }
  68.  
  69.     return 0;
  70. }
  71.  
  72.  
  73. void push(double value)
  74. {
  75.     if(!isFull()){
  76.         stack[sp] = value;
  77.         sp++;
  78.     }
  79. }
  80.  
  81.  
  82. double pop(void)
  83. {
  84.     if(!isEmpty()){
  85.         sp--;
  86.         return stack[sp];
  87.     }
  88.  
  89.     return 0;
  90. }
  91.  
  92.  
  93. int isFull(void)
  94. {
  95.     if(sp >= SIZE){
  96.         return 1;
  97.     }
  98.     return 0;
  99. }
  100.  
  101.  
  102. int isEmpty(void)
  103. {
  104.     if(sp <= 0){
  105.         return 1;
  106.     }
  107.     return 0;
  108. }
  109.  
  110.  
  111. void answer(void)
  112. {
  113.     if(!isEmpty()){
  114.         printf("answer = %f\n", pop());
  115.     }
  116. }
  117.  
  118.  
  119. void reset(void)
  120. {
  121.     sp = 0;
  122. }
Success #stdin #stdout 0s 5304KB
comments (?)
stdin
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5
8
5
3
1
9
stdout
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1:+ 2:- 3:* 4:/ 5:data 9:answer
answer = 11.000000
https://ideone.com/O2ScJ0
language:
C (gcc 8.3)
created:
6 hours ago
visibility:
public

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