TgwGOV - Online C Compiler & Debugging Tool

#define SIZE 5
int queue[SIZE];
int head, tail,i;

void enqueue(int value);
int dequeue(void);

int main(void)
{
    head = tail = 0;
    int data;

    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;
}

void enqueue(int value){
  if( head == (tail+1)%SIZE ){
        printf("キューは満杯で入りませんでした\n");
    }else{
        queue[tail++] = value;
    }
    tail = tail % SIZE;
}

int dequeue(void){
  int value;
	if( head == tail ){
        printf("キューは空で取り出せませんでした\n");
        return 0;
    }
    else{
         queue[head]=0;
         value = queue[head++];
    }
    head = head % SIZE;
    return value;
}