#include<stdio.h>
 
#define SIZE 5
int queue[SIZE];
int head, tail;
 
void enqueue(int value){
	if(head==(tail%SIZE)){
		printf("はいんない\n");
	}else{
		queue[tail++];
	}
	tail = tail%SIZE;
}
int dequeue(void){
	if(tail==(head%SIZE)){
			printf("はいんない\n");
	}else{
		queue[head++];
	}
	head = head%SIZE;
	return head;
}
 
int main(void)
{
    head = tail = 0; 
    int data, i;
 
    enqueue(1);
    enqueue(2);
    dequeue();
    enqueue(3);
    dequeue();
    enqueue(4);
    enqueue(5);
    dequeue();
    enqueue(6);
 
    for(i=0; i<SIZE; i++){
      printf("queue[%d]=%d\n", i, queue[i] );
    }
 
    return 0;
}
 
 
 

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