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  1. #include <stdio.h>
  2.  
  3. #define SIZE 5
  4. int queue[SIZE];
  5. int head, tail;
  6.  
  7. void enqueue(int value);
  8. int dequeue(void);
  9.  
  10. int main(void) {
  11.     head = tail = 0;
  12.     int data, i;
  13.  
  14.     enqueue(1);
  15.     enqueue(2);
  16.     dequeue();
  17.     enqueue(3);
  18.     dequeue();
  19.     enqueue(4);
  20.     enqueue(5);
  21.     dequeue();
  22.     enqueue(6);
  23.  
  24.     for (i = 0; i < SIZE; i++) {
  25.         printf("queue[%d]=%d\n", i, queue[i]);
  26.     }
  27.  
  28.     return 0;
  29. }
  30.  
  31. void enqueue(int value)
  32. {
  33.     if (((tail + 1) % SIZE) == head) {
  34.         printf("キューは満杯で入りませんでした\n");
  35.     } else {
  36.         queue[tail] = value;
  37.         tail = (tail + 1) % SIZE;
  38.     }
  39. }
  40.  
  41. int dequeue(void)
  42. {
  43.     int value;
  44.     if (head == tail) {
  45.         printf("キューは空で取り出せませんでした\n");
  46.         return 0;
  47.     } else {
  48.         value = queue[head];
  49.         head = (head + 1) % SIZE;
  50.         printf("取り出した値:%d\n", value);
  51.         return value;
  52.     }
  53. }
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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取り出した値:1
取り出した値:2
取り出した値:3
queue[0]=6
queue[1]=2
queue[2]=3
queue[3]=4
queue[4]=5
https://ideone.com/NxnXex
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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