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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. {
  12.     head = tail = 0; 
  13.     int data, i;
  14.  
  15.     enqueue(1);
  16.     enqueue(2);
  17.     dequeue();
  18.     enqueue(3);
  19.     dequeue();
  20.     enqueue(4);
  21.     enqueue(5);
  22.     dequeue();
  23.     enqueue(6);
  24.     for(i=0; i<SIZE; i++){
  25.       printf("queue[%d]=%d\n", i, queue[i] );
  26.     }
  27.     return 0;
  28. }
  29. void enqueue(int value)
  30. {
  31.     if ((tail + 1) % SIZE == head) {
  32.         printf("キューは満杯です\n");
  33.         return;
  34.     }
  35.     queue[tail] = value;
  36.     tail = (tail + 1) % SIZE;
  37. }
  38. int dequeue(void)
  39. {
  40. 	int value;
  41.     if (head == tail) {
  42.         printf("キューは空です\n");
  43.         return -1;
  44.     }
  45.     value = queue[head];
  46.     queue[head] = 0;
  47.     head = (head + 1) % SIZE;
  48.     return value;
  49. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
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Standard input is empty
stdout
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queue[0]=6
queue[1]=0
queue[2]=0
queue[3]=4
queue[4]=5
https://ideone.com/kePuM5
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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