Implementing Queue in C. Using Array

/* Implementing Queue in C. Using Array */
#include <stdio.h>
#define CAPACITY 5
int front = 0, rear = -1, totalitem = 0;
int ourq[CAPACITY];

void enq(int item)
{
    if (totalitem == CAPACITY)
    {
        printf("Opps!!The queue is Full\n");
        return;
    }
    else
    {
        rear = (rear + 1) % CAPACITY;
        ourq[rear] = item;
        totalitem++;
    }
}

int deq()
{
    if (totalitem == 0)
    {
        printf("Opps!!The queue is empty\n");
        return -1;
    }
    else
    {
        int frontitem = ourq[front];
        ourq[front] = -1;
        front = (front + 1) % CAPACITY;
        totalitem--;
        return frontitem;
    }
}

void print()
{
    int i;
    for (i = 0; i < CAPACITY; i++)
    {
        printf("%d ", ourq[i]);
    }
    printf("\n");
}

int main()
{
    printf("Implementing Queue\n");
    enq(10);
    enq(20);
    enq(30);
    enq(40);
    print();
    enq(50);
    print();
    enq(60);
    printf("Deq: %d\n", deq());
    print();
    enq(70);
    print();

    return 0;
}


/*
Output:
Implementing Queue
10 20 30 40 0
10 20 30 40 50
Opps!!The queue is Full
Deq : 10
- 1 20 30 40 50
70 20 30 40 50
*/