Problem with pointer in Function C

Question

I’m having second thoughts about the registration function. In the part where I inform dynamically through a counter the number already registered, when it arrives in the second iteration, the variable that I passed for reference qtd assumes a totally random value (memory junk I think). The strange thing is that when compiling the program several times for testing, I noticed that sometimes it kept the correct value in the variable, but most of the time it assumed a totally random value. I wonder if this has anything to do with pointers, because I haven’t studied this concept yet. Follow the photo of the execution and the code below. If anyone can help me I’d be grateful.

void cadastro(struct ficha_pessoa *cadp, int *qtd, int *menu) 
{
    char opt;
    int i,cont;

//cont = *qtd;    

if (*menu == 0)
{
    do
    {
        
        printf("Deseja cadastrar(s/n):");
        scanf("%c", &opt);
        fflush(stdin);
        system("cls");
        
    }while(opt != 's' && opt != 'S' && opt != 'n' && opt != 'N');
    
    
        if (opt == 's' || opt == 'S')
        {   
            do
            {
                printf("Digite a Quantidade de Cadastros (Max:10):");
                scanf("%d", *(&qtd));
                //scanf("%d", *(&qtd));
                
                fflush(stdin);
                system("cls");
            }while(*qtd > 10);  
            
            for (i=0; i < *qtd; i++)
            {   
                printf("Quantidade de Cadastros: %d/%d \n", i , *qtd);   //<- Problema aqui.
                
                printf("Nome:");
                scanf("%s", cadp[i].nome);      
                fflush(stdin);
          
                printf("Idade:");
                scanf("%d", &cadp[i].idade);      
                fflush(stdin);
                
                printf("Altura:");
                scanf("%f", &cadp[i].altura);      
                fflush(stdin);
                
                printf("Peso:");
                scanf("%f", &cadp[i].peso);      
                fflush(stdin);
                
                //cont++;
                system("cls");
                //fflush(stdin);
            }
            
            *menu = 1;  
            printf("Quantidade Máxima de registros atingida: %d\n\n", *qtd);
        }
}
else if (*menu != 0)
{
    printf("O cadastro ja foi efetuado!");
    system("pause");
    system("cls");
}
}

https://stackoverflow.com/[! [image][1]][1]. jpg