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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.     double value, cal1, cal2;
  18.     int resp;
  19.     int dataCount = 0;
  20.  
  21.     reset();
  22.  
  23.     while (1) {
  24.         scanf("%d", &resp);
  25.  
  26.         if (resp == 9) {
  27.             break;
  28.         }
  29.  
  30.         switch (resp) {
  31.         case 1:
  32.             cal1 = pop();
  33.             cal2 = pop();
  34.             push(cal1 + cal2);
  35.             break;
  36.  
  37.         case 2:
  38.             cal1 = pop();
  39.             cal2 = pop();
  40.             push(cal2 - cal1);
  41.             break;
  42.  
  43.         case 3:
  44.             cal1 = pop();
  45.             cal2 = pop();
  46.             push(cal1 * cal2);
  47.             break;
  48.  
  49.         case 4:
  50.             cal1 = pop();
  51.             cal2 = pop();
  52.             push(cal2 / cal1);
  53.             break;
  54.  
  55.         case 5:
  56.             scanf("%lf", &value);
  57.             dataCount++;
  58.             printf("data%d:%.6f\n", dataCount, value);
  59.             push(value);
  60.             break;
  61.         }
  62.     }
  63.  
  64.     answer();
  65.     return 0;
  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.  
  82.     return 0;
  83. }
  84.  
  85. int isFull(void)
  86. {
  87.     return sp >= SIZE;
  88. }
  89.  
  90. int isEmpty(void)
  91. {
  92.     return sp <= 0;
  93. }
  94.  
  95. void answer(void)
  96. {
  97.     if (!isEmpty()) {
  98.         printf("\nanswer:%.6f\n", stack[sp - 1]);
  99.     }
  100. }
  101. void reset(void)
  102. {
  103.     sp = 0;
  104. }
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
5
1
5
2
1
9
stdout 
data1:1.000000
data2:2.000000

answer:3.000000
https://ideone.com/zE6M8Z
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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