AVANCE PREGUNTA 3 FICHEROS, C (gcc)

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#include <string.h>
typedef struct
{
    char palabra[41];
    unsigned long long frecuencia;
    unsigned long long longitud;
}tipoPalabra;
//palabras array[1000];
unsigned short verificar(char *cadena)
{
    while ( *cadena != '\0' )
    {
        if ( !isalpha(*cadena) )
            return 0;
            
        cadena ++;    
    }
    return 1;
}
void strUpper(char *cadena)
{
    while ( *cadena != '\0' )
    {
        if ( islower(*cadena) )
            *cadena = toupper(*cadena);
        cadena ++;    
    }
}
/*
long long verificarPosicion(char *cadena, unsigned long long N)
{
    unsigned long long i;
    for ( i = 0 ; i < N ; i ++)
    {
        if ( strcmp(cadena, str[i]) == 0) return i;
    }
    return 0;
}*/
void nubeDePalabras(FILE *entrada)
{
    char cadena[41];
    //long long posicion;
    //tipoPalabra *palabras = NULL;
    unsigned long long N = 0;
    //unsigned long long i;
    while ( fscanf(entrada, "%s", cadena) != EOF )
    {
        if ( verificar(cadena) )
        {
            strUpper(cadena);
            /*
            palabras = (tipoPalabra *) realloc( palabras, sizeof(tipoPalabra *) * ( N + 1 ) );
            if ( palabras == NULL ) exit(EXIT_FAILURE);*/
            //printf("%s\n", cadena);
            N ++;
        }
    }
    printf("%llu", N);
    
}

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