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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.  
  25.     for(i=0; i<SIZE; i++){
  26.       printf("queue[%d]=%d\n", i, queue[i] );
  27.     }
  28.  
  29.     return 0;
  30. }
  31.  
  32. void enqueue(int value)
  33. {
  34.     if(head==tail+1)printf("キューは満杯で入りませんでした\n");
  35.     else queue[tail++]=value;
  36.     tail=tail%SIZE;
  37. }
  38.  
  39. int dequeue(void)
  40. {
  41.     int data;
  42.     if(head==tail){
  43.     	printf("キューは空で取り出せませんでした\n");
  44.     	return 0;
  45.     }
  46.     else {
  47.     	data=queue[head];
  48.     	queue[head++]=0;
  49.     }
  50.     head=head%SIZE;
  51. 	return data;
  52. }
  53.  
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin 
Standard input is empty
stdout 
queue[0]=6
queue[1]=0
queue[2]=0
queue[3]=4
queue[4]=5
https://ideone.com/shf4F4
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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