Process exited with return value 255, w/pointers to structures - c

Question

I have some functions that should allow me to manage a structure which was allocated dynamically. The allocation of the memory and the input of data in those is no real problem, though my program stops when it reaches a certain line of code: (No warning or problems detected)
if(codeV == p_vendite[ctrl_j].p_venditore[ctrl_i].codVenditore)
This line is in the function called VenditeProdotto(Vendite *p_vendite).
Here's the important part of the code (defining structures)
typedef struct _Venditore {
int codVenditore;
int codProdotto;
int qty;
} Venditore;
typedef struct _Vendite{
int mmGG;
Venditore *p_venditore;
} Vendite;
void AggiungiVendita (Vendite *p_vendite);
void VenditeProdotto(Vendite *p_vendite);
void VenditeVenditore(Vendite *p_vendite);
...
Here's main():
int main() {
int check, i, count, flag, choice;
Vendite *p_Vendite;
...
...
p_Vendite = (Vendite*) calloc(numVenditori,sizeof(Vendite));
...
...
p_Vendite->p_venditore = (Venditore*)calloc(numVenditori,sizeof(Venditore));
/*menu*/
flag = TRUE;
do{
choice = menu();
switch (choice) {
case 1 : AggiungiVendita(p_Vendite); break;
...
case 3 : VenditeProdotto(p_Vendite); break;
case 4 : VenditeVenditore(p_Vendite); break;
...
}
} while (flag == TRUE);
return 0;
}
And here are the functions:
void AggiungiVendita (Vendite *p_vendite) {
int flag, check, answer;
i = 0;
do{
/*input of struct - codVenditore,codProdotto,qty*/
...
check = scanf("%d", &(p_vendite[j].p_venditore[i].codVenditore));
...
/*input*/
check = scanf("%d", &(p_vendite[j].p_venditore[i].codProdotto) );
...
/*controllo sull'input*/
check = scanf("%d", &(p_vendite[j].p_venditore[i].qty) );
...
...
//asking to redo or quit
} while(flag == TRUE && i < numVenditori);
return;
}
int menu() {
//just a standard menu, no problem here
...
return choice;
}
void VenditeProdotto(Vendite *p_vendite) {
int check = 0, codeP = 0, ctrl_i = 0, ctrl_j = 0; //ctrl_i,ctrl_j are increasing variables and I use them to search among the structures
...//input, continues after
Where I find the debug error: (line 3 after this)
for(ctrl_j = 0; ctrl_j < numVendite; ctrl_j++) {
for(ctrl_i = 0; ctrl_i < numVenditori; ctrl_i++) {
if (codeP == p_vendite[ctrl_j].p_venditore[ctrl_i].codProdotto)
printf("\nSeller %d, quantity sold: %d in day %d", p_vendite[ctrl_j].p_venditore[ctrl_i].codVenditore, p_vendite[ctrl_j].p_venditore[ctrl_i].qty, ctrl_j+1);
else
continue;
}
}
return;
}
Basically I don't know if it's really legit to use the first line of code that I've talked about, with . instead of ->, but if I try to change the syntax I get detected errors. Any ideas?
At first I thought about something like (p_vendite+ctrl_j)->(p_venditore+ctrl_i)->codProdotto, since it's a pointer but it doesn't seem working.

Answer 1

There are a couple of obvious bugs:
Allocation of Vendite
You're allocating numVenditori elements for p_Vendite, but later on you are iterating numVendite times over the same pointer:
p_Vendite = (Vendite*) calloc(numVenditori,sizeof(Vendite));
...
for(ctrl_j = 0; ctrl_j < numVendite; ctrl_j++) {
for(ctrl_i = 0; ctrl_i < numVenditori; ctrl_i++) {
if (codeP == p_vendite[ctrl_j].p_venditore[ctrl_i].codProdotto)
The allocation should read:
p_Vendite = (Vendite*) calloc(numVendite,sizeof(Vendite));
or as I would prefer it:
p_Vendite = calloc (numVendite, sizeof *p_Vendite);
Allocation of Venditore
p_Vendite->p_venditore = (Venditore*)calloc(numVenditori,sizeof(Venditore));
You're only allocating the p_venditore element for one of your Vendite structs. You need to allocate all of them in a loop:
for (int j = 0; j < numVendite; j++) {
p_Vendite[j].p_venditore = (Venditore*)calloc(numVenditori,sizeof(Venditore));
// And check for allocation errors
}