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  1. #include <stdio.h>
  2.  
  3. #define SIZE 10
  4. double stack[SIZE];
  5. int sp;
  6. void push(double value);
  7. double pop(void);
  8. int isFull(void);
  9. int isEmpty(void);
  10. void answer(void);
  11. void reset(void);
  12.  
  13. int main(void) {
  14.     reset(); 
  15.  
  16.     int resp;
  17.     double data, cal1, cal2;
  18.  
  19.     while (1) {
  20.         if (scanf("%d", &resp)!=1) break; 
  21.         if (resp == 0) break; 
  22.  
  23.         switch (resp) {
  24.             case 1: 
  25.                 cal2 = pop();
  26.                 cal1 = pop();
  27.                 push(cal1 + cal2);
  28.                 break;
  29.  
  30.             case 2:
  31.                 cal2 = pop();
  32.                 cal1 = pop();
  33.                 push(cal1 - cal2);
  34.                 break;
  35.  
  36.             case 3: 
  37.                 cal2 = pop();
  38.                 cal1 = pop();
  39.                 push(cal1 * cal2);
  40.                 break;
  41.  
  42.             case 4: 
  43.                 cal2 = pop();
  44.                 cal1 = pop();
  45.                 push(cal1 / cal2);
  46.                 break;
  47.  
  48.             case 5: 
  49.                 printf("data:");
  50.                 scanf("%lf", &data);
  51.                 printf("%f\n", data);
  52.                 push(data);
  53.                 break;
  54.  
  55.             case 9: 
  56.                 answer();
  57.                 printf("\n");
  58.                 break;
  59.         }
  60.     }
  61.  
  62.     return 0;
  63. } 
  64. void push(double value) {
  65.     if (isFull()) {
  66.         printf("スタックが満杯です\n");
  67.     } else {
  68.         stack[sp++] = value;
  69.     }
  70. }
  71.  
  72. double pop(void) {
  73.     if (isEmpty()) {
  74.         printf("スタックが空です\n");
  75.         return 0;
  76.     } else {
  77.         return stack[--sp];
  78.     }
  79. }
  80.  
  81. int isFull(void) {
  82.     if (sp == SIZE) {
  83.         return 1;
  84.     } else {
  85.         return 0;
  86.     }
  87. }
  88.  
  89. int isEmpty(void) {
  90.     if (sp == 0) {
  91.         return 1;
  92.     } else {
  93.         return 0;
  94.     }
  95. }
  96.  
  97. void answer(void) {
  98.     if (!isEmpty()) {
  99.         printf("answer:%f\n", pop());
  100.     }
  101. }
  102.  
  103. void reset(void) {
  104.     sp = 0;
  105. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
5
1
5
2
1
9
0
stdout 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/U8GgVm
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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