C program crashes when a function is called.

Question

So, I ask the user for novo->prato (a list item), but somewhere in the function call or the scanf before it, the program crashes and I can't see what is wrong with the code.

These are the declarations and the function.

typedef struct pedido pedido, *ppedido;

struct ingrediente{
    char nome[15];
    int id;
    int qtd;
    int limite;
    int consumo_medio;
};

struct item{
    char id[5];
    int ing[10];
    float qtd[10];
};

struct pedido{
    char id[5];
    int prioridade;
    int mesa, n_pratos;
    struct prato *prato[TAM];
    ppedido prox;
};

struct prato{
    char id[5];
};

int verifica_prato(char prato[])
{
    FILE *f;
    struct item aux;

    int i=0, j=0;

    f = fopen("menu.bin", "rb");

    while((fread(&aux, sizeof(struct item), 1, f)) == 1){
        if((strcmp(prato, aux.id)) == 0)
        i++;
    }
    fclose(f);

    if(i == 0){
        printf("Prato nao existe no menu.\n");
        return 1;
    }

    if(i > 1)
        return 0;
    }

This is where the function ia called.

for(i=0;i<novo->n_pratos;i++){
    do{
        printf("Introduza o ID do prato %d: ", i+1);
        scanf("%s", &novo->prato[i]);
        printf("%s", novo->prato[i]);
        k = verifica_prato(novo->prato[i]); //this function
        if(k == 0)
            w = verifica_ing(novo->prato[i]->id);
        }while(k != 0);
}

Answer 1

Inside verifica_prato()
after the line f = fopen("menu.bin", "rb") you should check whether the file opened successfully or not.
use if( f != NULL )

Answer 2

Is novo->n_pratos always less than TAM ? There could be a bounds error if it n_pratos exceeds TAM , because TAM has been defined as the array size.

Answer 3

verifca_prato的签名不应该是int verifica_prato（struct prato），或者调用应该是verifica_prato（novo-> prato [i] - > id）;