Function to dequeue in C

Personal I have to do a dequefile function. Get the user: -1 to dequeue an element or 2 to queue an element That is the user to queue has to enter option 2 and then enter the values and go adding so. If he wants to remove a value from the queue, the user will type -1 and will withdraw, removing until empty.

I've made the queuing, I want to know how you do the dewandling.

#define TAM_FILA 10

typedef struct
{
    int inicio, fim;
    int fila[TAM_FILA];
} tipo_fila;

int desenfileirar(tipo_fila *fila)
{
    //printf("\n\n Desenfileirar ...\n");

    if(fila->inicio==fila->fim)
    {
        printf ("Fila vazia!");
    }
    else
    {
        /*int i;
        for(i=0; i < TAM_FILA; i++)
        {
            fila->fila[i]=fila->fila[i+1];
        }
        fila->fila[fila->fim]=0
        fila->fim--;*/
    }
    return 0;
}