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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.     reset();
  17.  
  18.     while(1) {
  19.         int resp;
  20.         double value, a, b;
  21.  
  22.         scanf("%d", &resp);
  23.  
  24.         switch(resp) {
  25.             case 1:
  26.                 b = pop();
  27.                 a = pop();
  28.                 push(a+b);
  29.                 break;
  30.  
  31.             case 2:
  32.                 b = pop();
  33.                 a = pop();
  34.                 push(a-b);
  35.                 break;
  36.  
  37.             case 3:
  38.                 b = pop();
  39.                 a = pop();
  40.                 push(a*b);
  41.                 break;
  42.  
  43.             case 4:
  44.                 b = pop();
  45.                 a = pop();
  46.                 push(a/b);
  47.                 break;
  48.  
  49.             case 5:
  50.                 scanf("%lf", &value);
  51.                 printf("data:%f\n", value);
  52.                 push(value);
  53.                 break;
  54.  
  55.             case 9:
  56.                 break;
  57.         }
  58.  
  59.         if(resp == 9) break;
  60.     }
  61.  
  62.     answer();
  63.  
  64.     return 0;
  65. }
  66.  
  67. void push(double value)
  68. {
  69.     if(!isFull()) {
  70.         stack[sp] = value;
  71.         sp++;
  72.     }
  73. }
  74.  
  75. double pop(void)
  76. {
  77. if(!isEmpty()) {
  78.         sp--;
  79.         return stack[sp];
  80.     }
  81.     return 0;
  82. }
  83.  
  84. int isFull(void)
  85. {
  86.     if(sp == SIZE) return 1;
  87.     else return 0;
  88. }
  89.  
  90. int isEmpty(void)
  91. {
  92.     if(sp == 0) return 1;
  93.     else return 0;
  94. }
  95.  
  96. void answer(void)
  97. {
  98.     if(!isEmpty()) {
  99.         printf("\nanswer:%f\n", stack[sp-1]);
  100.     }
  101. }
  102.  
  103. void reset(void)
  104. {
  105.     sp = 0;
  106.  
  107. }
  108.  
Success #stdin #stdout 0s 5244KB
comments (?)
stdin
copy 
5
1
5
2
1
9
stdout
copy 
data:1.000000
data:2.000000

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

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