change value of struct inside a struct - struct

Question

The secondexample below is what I would like to achieve in the firstcode written up. I want to ask how many 'dati' wants to insert then I have to do a malloc and I want to ask and save each dato of every struct so, firstly cdfM of the struct maestra and so on... How can I do that? How should I create the array with the malloc and how what should I do to save all the infos?
thx
#include <stdio.h>
#include <stdlib.h>
#define MAX 30
struct dati{
struct maestra{
char cdfM[MAX];
char nomeM[MAX];
char cognomeM[MAX];
char specializzazioneM[MAX];
}
struct classe{
int id;
char nome[MAX];
char colore[MAX];
}
struct insegnamento{
int idclasseI;
char cfmaestra[MAX];
}
struct bambino{
char cdfB[MAX];
char nomeB[MAX];
char cognomeB[MAX];
char dataNascita[MAX];
int idclasseB;
char dataIscrizione[MAX];
}
}
int main () {
struct dati *p,*q,*r,*s;
struct maestra **p;
struct classe **q;
struct insegnamento **r;
struct bambino **s;
return 0;
}
#include <stdio.h>
#include <stdlib.h>
#define MAX 30
struct studente{
char nomeCognome[MAX];
int numeroMatricola;
float percentualeEP;
};
int main() {
struct studente *p;
int m, i;
printf("Quanti studenti devi inserire: \n");
scanf("%d", &m);
p = malloc(m*sizeof(int));
for (i=0; i < m; i++){
printf("Inserisci i dati dell'utente numero %d\n",i+1);
printf("Inserisci il nome cognome: \n");
scanf(" ");
fgets((p+i)->nomeCognome, MAX, stdin);
printf("Inserisci la matricola: \n");
scanf("%d",&(p+i)->numeroMatricola);
printf("Inserisci la percentuale di esami passati: \n");
scanf("%f", &(p+i)->percentualeEP);
}