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  1. #include<stdio.h>  //演習
  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);  //6,0,0,4,5
  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("キューは満杯です。\n");
  36. 	}
  37. 	else {
  38. 		queue[tail++]=value;
  39. 	}
  40. 	tail=tail%SIZE;	
  41. }
  42.  
  43. int dequeue(void)
  44. {
  45. 	int value;
  46. 	if(head==tail){
  47. 		printf("キューは空です。\n");
  48. 		return 0;
  49. 	}
  50. 	else {
  51. 		value=queue[head++];
  52. 		queue[head-1]=0;
  53. 	}
  54. 	head=head%SIZE;
  55. 	return value;
  56. }
  57.  
Success #stdin #stdout 0.01s 5284KB
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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/lCrDRF
プロ演III　第１回提出課題(演習)
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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