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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. void enqueue(int value)
  33. {
  34. 	 if(head==tail+1){
  35. 	 	printf("満杯なため入りません");
  36. 	 }
  37. 	 else{
  38. 	 	queue[tail++]=value;
  39. 	 }
  40. }
  41.  
  42. int dequeue(void)
  43. {
  44. 	if(head==tail){
  45. 		printf("空で取り出せませんでした");
  46. 	}
  47. 	else{
  48. 	return queue[--head];
  49. 	head--;
  50. 	queue[head]=0;
  51.  
  52.  
  53. 	}
  54.  
  55.  
  56. }
  57.  
Success #stdin #stdout 0s 5276KB
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stdin
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Standard input is empty
stdout
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queue[0]=1
queue[1]=2
queue[2]=3
queue[3]=4
queue[4]=5
https://ideone.com/imB6qR
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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