error: request for member ‘txt’ in something not a structure or union

Excuse me, I have a problem in my code when I try to compile it, and I don't understand what's the error to solve:

"6:26:error:requestformember‘txt’in something not a structure or union"

                fichero = fopen(fichero.txt,"r");

Can anyone help me please

I leave you my code:

#include <stdio.h>
int calcular(char nombre[]){
  FILE *fichero; int contar, maximo = 0;
  char caracter;
  fichero = fopen(fichero.txt,"r");
        if(fichero == NULL)
         printf("ERROR de Apertura");
        else{
             while(!feof(fichero)){
                 fscanf(fichero, "%c", & caracter);
                 if(caracter == '/n'){
                   if(contar > maximo)
                      maximo = contar;
                      contar = 0;
                      fclose(fichero);        
                      fclose(salida);
                 }
             }
             contar++;
        }
        return(linea);
}