# Queues Data Structure Homework Help

Queue is a data structure that maintain "**First In First Out**" (**FIFO**) order. In encoding, queue is generally utilized like a data structure for **BFS** (**Breadth First Search**).

Queue A first-in, first-out (FIFO) data structure.

### Queue Operations

Operations on queue Q are :

**enqueue :**insert item at the back of queue Q**dequeue :**return (and virtually remove) the front item from queue Q**init :**intialize queue Q, reset all variables.

### Implementation In C

```
#include<studio.h>
```

#define QUEUE_SIZE100

typedefstruct{int q[QURUE_SIZE];

int first, last;

int count;

}queue;

void init_queue(queue*q)

{ q->first=0;

q->last=QUEUE_SIZE-1;

q->count=0;}

void enqueue (queue*q,int x){

q->last=(q->last+1)%QUEUE_SIZE;

q->q[q->last]=x;

q->count=q->count+1;}
int dequeue(queue*q){
intx=q->q[q->first];

q->first=(q->first+1)%QUEUE_SIZE;

q->count=q->count-1;

return x;}

int main(){

queue q;

init_queue(&q);

enqueue(&q,1);

enqueue(&q,2);

enqueue(q3,3);

while(q.count)

printf(%d\n", dequeue(&q));

return 0;}

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