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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.     reset();
  16.  
  17.     while(1) {
  18.         int resp;
  19.         double data;
  20.         scanf("%d", &resp);
  21.  
  22.         if(resp == 9) {
  23.             break;
  24.         }
  25.  
  26.         switch(resp) {
  27.             case 1:
  28.                 push(pop() + pop());
  29.                 break;
  30.             case 2: {
  31.                 double d2 = pop();
  32.                 double d1 = pop();
  33.                 push(d1 - d2);
  34.                 }
  35.                 break;
  36.             case 3: {
  37.                 double d2 = pop();
  38.                 double d1 = pop();
  39.                 push(d1 * d2);
  40.                 }
  41.                 break;
  42.             case 4: {
  43.                 double d2 = pop();
  44.                 double d1 = pop();
  45.                 push(d1 / d2);
  46.                 }
  47.                 break;
  48.             case 5:
  49.                 scanf("%lf", &data);
  50.                 printf("data:%f\n", data);
  51.                 push(data);
  52.                 break;
  53.         }
  54.     }
  55.     answer();
  56.     return 0;
  57. }
  58.  
  59. void push(double value) {
  60.     if(isFull()) {
  61.         printf("スタックが満杯で入りませんでした\n");
  62.     } else {
  63.         stack[sp++] = value;
  64.     }
  65. }
  66.  
  67. double pop(void) {
  68.     if(isEmpty()) {
  69.         printf("スタックが空で取り出せませんでした\n");
  70.         return 0;
  71.     } else {
  72.         return stack[--sp];
  73.     }
  74. }
  75.  
  76. int isFull(void) {
  77.     if(sp >= SIZE) {
  78.         return 1;
  79.     } else {
  80.         return 0;
  81.     }
  82. }
  83.  
  84. int isEmpty(void) {
  85.     if(sp <= 0) {
  86.         return 1;
  87.     } else {
  88.         return 0;
  89.     }
  90. }
  91.  
  92. void answer(void) {
  93.     if(!isEmpty()) {
  94.         printf("answer:%f\n", pop());
  95.     }
  96. }
  97.  
  98. void reset(void) {
  99.     sp = 0;
  100. }
Success #stdin #stdout 0.01s 5312KB
comments (?)
stdin
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5
1
5
2
1
9
stdout
copy 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/86Cyt7
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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