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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 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.  
  25.     for(i=0; i<SIZE; i++){
  26.       printf("queue[%d]=%d\n", i, queue[i] );
  27.     }
  28.  
  29.     return 0;
  30. }
  31.    void enqueue(int value)
  32. {
  33.     if (head == (tail + 1) % SIZE) {
  34.         printf("キューは満杯で入りません\n");
  35. }else{
  36.     queue[tail] = value;
  37.     tail++;
  38. }
  39. tail = tail % SIZE;
  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.     }
  48. else{
  49.  
  50.     value = queue[head];
  51.     queue[head]=0;
  52.     head++;
  53. }
  54. head = head % SIZE; 
  55. return value;
  56. }
  57.  
Success #stdin #stdout 0s 5320KB
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/dc0hbV
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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