atleti **leggifile(int *N){
int i;
int aa,mm,gg,ore;
atleti **atl;
atleti *rif;
char b_nome[40],b_cogn[40],b_cod[40],b_sport[40],b_data[40];
FILE *fp;
if((fp=fopen("atleti.txt","r"))==NULL){
    printf("Errore apertura file atleti");
    exit(1) ;}
fscanf(fp,"%d",N);
rif=malloc(*N*sizeof(atleti));
atl=malloc(*N*sizeof(rif));
for(i=0;i<*N;i++){
    atl[i]=&rif[i];
}
for(i=0;i<*N;i++){
    fscanf(fp,"%s %s %s %s %s %d",b_cod,b_nome,b_cogn,b_sport,b_data,&ore);
    atl[i]->ore_all=ore;
    atl[i]->nome=malloc((strlen(b_nome)+1)*sizeof(char));
    strcpy(atl[i]->nome,b_nome);
    atl[i]->codice=malloc((strlen(b_cod)+1)*sizeof(char));
    strcpy(atl[i]->codice,b_cod);
    atl[i]->cognome=malloc((strlen(b_cogn)+1)*sizeof(char));
    strcpy(atl[i]->cognome,b_cogn);
    atl[i]->sport=malloc((strlen(b_sport)+1)*sizeof(char));
    strcpy(atl[i]->sport,b_sport);
    if(atl[i]->nome==NULL || atl[i]->cognome==NULL || atl[i]->codice ==NULL || atl[i]->sport == NULL || atl[i]->data ==NULL){
        printf("errore allocazione");
    }
    sscanf(b_data,"%d/%d/%d",&gg,&mm,&aa);
    sprintf(atl[i]->data,"%d/%d/%d",aa,mm,gg);
}
return atl;
}