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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)%SIZE ){
  35. 		printf("キューは満杯で入りませんでした\n");
  36. 	} else{
  37. 		queue[tail] = value;
  38. 		 tail++;
  39. 	}
  40. 	tail = tail % SIZE;
  41. }
  42. int dequeue(void)
  43. {
  44. 	int value;
  45. 	if( head == tail ){
  46. 		printf("キューは空で取り出せませんでした\n");
  47. 		return 0;
  48. 	}else{
  49. 		value = queue[head];
  50. 		queue[head]=0;
  51. 		head++;
  52.  
  53. 	}
  54. 	head = head % SIZE;
  55. 	return value;
  56. }
Success #stdin #stdout 0s 5312KB
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/9v9yii
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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