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  1. #include <stdio.h>
  2. #define SIZE 100
  3.  
  4. int queue[SIZE];
  5. int front = -1, rear = -1;
  6.  
  7. void enqueue(int value) {
  8.     if (rear == SIZE - 1)
  9.         printf("Queue is full\n");
  10.     else {
  11.         if (front == -1)
  12.             front = 0;
  13.         rear++;
  14.         queue[rear] = value;
  15.         printf("Inserted %d\n", value);
  16.     }
  17. }
  18.  
  19. void dequeue() {
  20.     if (front == -1 || front > rear)
  21.         printf("Queue is empty\n");
  22.     else {
  23.         printf("Deleted: %d\n", queue[front]);
  24.         front++;
  25.     }
  26. }
  27.  
  28. void display() {
  29.     if (front == -1 || front > rear)
  30.         printf("Queue is empty\n");
  31.     else {
  32.         for (int i = front; i <= rear; i++)
  33.             printf("%d ", queue[i]);
  34.         printf("\n");
  35.     }
  36. }
  37.  
  38. int main() {
  39.     enqueue(10);
  40.     enqueue(20);
  41.     display();
  42.     dequeue();
  43.     display();
  44.     return 0;
  45. }
  46.  
  47.  
Success #stdin #stdout 0s 5296KB
comments (?)
stdin
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45
stdout
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Inserted 10
Inserted 20
10 20 
Deleted: 10
20
https://ideone.com/HRzHrq
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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