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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. 	head=tail=0;
  12. 	int i;
  13. 	enqueue(1);
  14. 	enqueue(2);
  15. 	dequeue();
  16. 	enqueue(3);
  17. 	dequeue();
  18. 	enqueue(4);
  19. 	enqueue(5);
  20. 	dequeue();
  21. 	enqueue(6);
  22.  
  23. 	for(i=0;i<SIZE;i++){
  24. 		printf("queue[%d]=%d\n",i,queue[i]);
  25. 	}
  26.  
  27. 	return 0;
  28. }
  29.  
  30. void enqueue(int value){
  31. 	if(head==(tail+1)%SIZE){
  32. 		printf("キューは満杯で入りませんでした");
  33. 	}
  34. 	else{
  35. 		queue[tail++]=value;
  36. 	}
  37. 	tail=tail%SIZE;
  38. }
  39.  
  40.  
  41. int dequeue(void){
  42. 	int value;
  43. 	if(head==tail){
  44. 		printf("キューが空で取り出せませんでした");
  45. 		return 0;
  46. 	}
  47. 	else{
  48. 		value=queue[head];
  49. 		queue[head]=0;
  50. 		head=head+1;
  51. 	}
  52. 	head=head%SIZE;
  53. 	return value;
  54. }
  55.  
Success #stdin #stdout 0s 5320KB
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/LtflE0
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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