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  1. #include <stdio.h>
  2. #define size 5
  3. int queue[size];
  4. int head, tail;
  5.  
  6. void enqueue(int value);
  7. int dequeue(void);
  8.  
  9. int main(void)
  10. {
  11.     head = tail = 0; 
  12.     int i;
  13.  
  14.     enqueue(1);
  15.     enqueue(2);
  16.     dequeue();
  17.     enqueue(3);
  18.     dequeue();
  19.     enqueue(4);
  20.     enqueue(5);
  21.     dequeue();
  22.     enqueue(6);
  23.  
  24.     for(i=0; i<size; i++){
  25.       printf("queue[%d]=%d\n", i, queue[i] );
  26.     }
  27.     return 0;
  28. }
  29. void enqueue(int value){
  30.    if(head == (tail+1)%size){
  31.    	printf("満杯の状態\n");
  32.    }
  33.    else{
  34.    	queue[tail++] = value;
  35.    	    }
  36.    tail = tail%size;
  37. }
  38.  
  39. int dequeue(void){
  40. 	int value;
  41. 	if(head == tail){
  42. 		printf("空の状態\n");
  43. 		return 0;
  44. 	}
  45. 	else{
  46. 		value = queue[head];
  47. 		queue[head] = 0;
  48. 		head++;
  49. 		}
  50. 		head = head%size;
  51. 		return value;
  52. }
  53.  
  54.  
  55.  
Success #stdin #stdout 0s 5324KB
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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/bLYNUk
language:
C99 (gcc 8.3)
created:
1 day ago
visibility:
public

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