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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.  
  32.  
  33. void enqueue(int value)
  34. {
  35. 	if(head==(tail+1)%SIZE){
  36. 		printf("キューは満帆で入りませんでした\n");
  37. 	}else{
  38. 		queue[tail]=value;
  39. 		tail=tail+1;
  40. 	}
  41. 	tail=tail%SIZE;
  42. }
  43.  
  44. int dequeue(void)
  45. {
  46. 	int value;
  47. 	if(head==tail){
  48. 		printf("キューは空で入りませんでした\n");
  49. 		return 0;
  50. 	}else{
  51. 		value=queue[head];
  52. 		queue[head]=0;
  53. 		head=head+1;
  54. 	}
  55. 	head=head%SIZE;
  56. 	return value;
  57.  
  58. }
  59.  
Success #stdin #stdout 0.01s 5292KB
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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/f57523
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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