queue with array c

Magic Thanos answered on September 19, 2022 Popularity 9/10 Helpfulness 4/10

answer queue with array c

queue with array c

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#include <stdio.h>
#include <stdlib.h>

#define QUEUE_LENGTH 10

int enqueue(int *queue, int *front, int *rear)
{
  if (*rear == QUEUE_LENGTH - 1)
  {
    printf("Queue is full.\n");
  }
  else if (*rear == -1 && *front == -1)
  {
    *rear = 0;
    *front = 0;
    printf("Give a number: ");
    int num;
    scanf("%i", &num);
    queue[*rear] = num;
  }
  else
  {
    printf("Give a number: ");
    int num;
    scanf("%i", &num);
    queue[++(*rear)] = num;
  }
}

int dequeue(int *queue, int *front, int *rear)
{
  if (*front == -1 && *rear == -1)
  {
    printf("Queue is empty.\n");
  }
  else if (*front == *rear)
  {
    printf("Removing %i...\n", queue[*front]);
    queue[*front] = 0;
    *front = -1;
    *rear = -1;
  }
  else
  {
    printf("Removing %i...\n", queue[*front]);
    queue[(*front)++] = 0;
  }
}

int print_queue(int *queue)
{
  printf("[ ");
  for (int i = 0; i < QUEUE_LENGTH; i++)
  {
    printf("%i ", queue[i]);
  }
  printf("]\n");
}

int main()
{

  int queue[QUEUE_LENGTH] = {0};
  int front = -1;
  int rear = -1;

  while (1)
  {
    int choice;
    do
    {
      printf("\tENQUEUE (0)\n");
      printf("\tDEQUEUE (1)\n");
      printf("\tPRINT (2)\n");
      printf("\tEXIT (3)\n");
      printf("\tGive choice: ");
      scanf("%i", &choice);
    } while (choice < 0 || choice > 3);

    switch (choice)
    {
    case 0:
      enqueue(queue, &front, &rear);
      break;

    case 1:
      dequeue(queue, &front, &rear);
      break;

    case 2:
      print_queue(queue);
      break;

    default:
      exit(0);
    }
  }
}

Popularity 9/10 Helpfulness 4/10 Language c

Source: Grepper

Tags: c queue

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Contributed on Sep 19 2022

Magic Thanos

0 Answers Avg Quality 2/10

queue with array c

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