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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.  
  9. int dequeue(void);
  10.  
  11. int main(void)
  12. {
  13.     head = tail = 0; 
  14.     int i;
  15.  
  16.     enqueue(1);
  17.     enqueue(2);
  18.     dequeue();
  19.     enqueue(3);
  20.     dequeue();
  21.     enqueue(4);
  22.     enqueue(5);
  23.     dequeue();
  24.     enqueue(6);
  25.  
  26.     for(i=0; i<SIZE; i++){
  27.       printf("queue[%d]=%d\n", i, queue[i] );
  28.     }
  29.  
  30.     return 0;
  31. }
  32.  
  33. void enqueue(int value)
  34. {
  35.    if  (head == (tail + 1) % SIZE) {
  36.         printf("キューは満杯で入りませんでした\n");
  37.         return;
  38.     }
  39.     queue[tail] = value;
  40.     tail = (tail + 1) % SIZE;
  41. }
  42.  
  43. int dequeue(void)
  44. {
  45.  if (head == tail) {
  46.         printf("キューは空で取り出せませんでした\n");
  47.         return -1;
  48.     }
  49.  
  50.   int  value = queue[head];
  51.     queue[head] = 0;            
  52.     head = (head + 1) % SIZE;
  53.  
  54.     return value;
  55. 	}
  56.  
  57.  
  58.  
  59.  
  60.  
Success #stdin #stdout 0.01s 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/OKqbXF
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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