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  1. #include <stdio.h>
  2.  
  3. #define SIZE 5
  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.     sp = 0;
  18.  
  19.     while(1){
  20.         int resp;
  21.         double data;
  22.  
  23.         printf("1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了\n");
  24.         scanf("%d",&resp);
  25.  
  26.         if(!resp) break;
  27.  
  28.         switch(resp){
  29.             case 1:
  30.             {
  31.                 double b = pop();
  32.                 double a = pop();
  33.                 push(a + b);
  34.                 break;
  35.             }
  36.  
  37.             case 2:
  38.             {
  39.                 double b = pop();
  40.                 double a = pop();
  41.                 push(a - b);
  42.                 break;
  43.             }
  44.  
  45.             case 3:
  46.             {
  47.                 double b = pop();
  48.                 double a = pop();
  49.                 push(a * b);
  50.                 break;
  51.             }
  52.  
  53.             case 4:
  54.             {
  55.                 double b = pop();
  56.                 double a = pop();
  57.                 push(a / b);
  58.                 break;
  59.             }
  60.  
  61.             case 5:
  62.                 printf("データ入力:\n");
  63.                 scanf("%lf",&data);
  64.                 push(data);
  65.                 break;
  66.  
  67.             case 9:
  68.                 answer();
  69.                 break;
  70.  
  71.             case 0:
  72.                 reset();
  73.                 break;
  74.  
  75.             default:
  76.                 printf("入力が間違っています\n");
  77.         }
  78.     printf("\n");
  79.     }
  80.  
  81.     return 0;
  82. }
  83.  
  84. void push(double value)
  85. {
  86.     if(!isFull()){
  87.         stack[sp] = value;
  88.         sp++;
  89.     }
  90. }
  91.  
  92. double pop(void)
  93. {
  94.     if(!isEmpty()){
  95.         sp--;
  96.         return stack[sp];
  97.     }
  98.     return 0;
  99. }
  100.  
  101. int isFull(void)
  102. {
  103.     return sp >= SIZE;
  104. }
  105.  
  106. int isEmpty(void)
  107. {
  108.     return sp <= 0;
  109. }
  110.  
  111. void answer(void)
  112. {
  113.     if(sp == 1){
  114.         printf("答え = %lf\n", stack[0]);
  115.     }
  116.     else{
  117.         printf("計算結果を表示できません\n");
  118.     }
  119. }
  120.  
  121. void reset(void)
  122. {
  123.     sp = 0;
  124. }
Success #stdin #stdout 0s 5264KB
comments (?)
stdin
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5
4
5
24
1
9
0
stdout
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1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了
データ入力:

1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了
データ入力:

1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了

1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了
答え = 28.000000

1:+ 2:- 3:× 4:÷ 5:データ入力 9:計算結果 0:終了
https://ideone.com/litHal
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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