Thread: Error when login with valid user!!!

Hi....again

I was testing my program then i realise that i have a bug in my code.

Well, i have a struct file with nickname and pass

When i use the fread i see 3 registered users.
When i want to login, i have only 2, and only one can log (fisrt one)

If i use the fread() all the values are not read??

My code is this one

Code:

int login()
{
    struct jogador j;
    int reg=0, op;
	char usr1[30], pass[30], auxiliar[30];
	FILE *fp;
	fp=fopen("registos.dat", "rb+");
	printf ("\n*=============================================================================*\n");
    printf ("|                       >>>> Login de Jogadores <<<<                       |\n");
    printf ("*=============================================================================*\n");
    printf ("                                                                               \n");
	printf("\n1- Registar | 2- Registado\n");
    scanf("\n%d", &op);
    getchar();
    if(op==1)
    {
        registo();
    }
    if(op==2)
    {
        reg=fread(&j, sizeof j, 1, fp);
        while(reg==1)
        {
            reg++;
            printf("\n %d players\n", reg);
            printf("\nnickname: \n");
            fgets(auxiliar,29,stdin);
            sscanf(auxiliar,"%[^\n]",usr1);
            fseek(fp, (reg - 1) * sizeof j, SEEK_SET);
            if(strcmp(usr1,j.nick)==0)
            {
                printf("\npassword: \n");
                fgets(auxiliar,29,stdin);
                sscanf(auxiliar,"%[^\n]",pass);
                if(strcmp(pass,j.pass)==0)
                {
                    system("cls");
                    printf("\n  1 - Jogo curto (2 perguntas) \n");
                    printf("\n  2 - Jogo medio (4 perguntas) \n");
                    printf("\n  3 - Jogo grande (8 perguntas)\n");
                    printf ("*=============================================================================*\n");
                    scanf("%d", &op);
                    getchar();
                    switch (op)
                    {
                    case 1:
                        gp1_Ques(usr1);
                        break;
                    case 2:
                        gp1_Ques2(usr1);
                        break;
                    case 3:
                        gp1_Ques3(usr1);
                        break;
                    default:
                        printf("\nOpcao invalida\n");
                        return 0;
                    }
                }
                else
                {
                    printf("Password errada");
                    return 0;
                }
            }
            else
            {
                printf("Nickname errado");
                return 0;
            }
        }
    }
    fclose(fp);
	return 0;
}

So, if i have 1 player is ok, if i have 20, only the first one in the list can log...

Ok Thanks

I don't have fseek anymore but still not working

Code:

int listarJog()
{
    struct jogador j;
    int retorno, cont = 0;
	FILE *f;
	if ((f= fopen("registos.dat", "rb")) == NULL)
	{
		printf("Erro ao abrir ficheiro\n");
	}
	printf ("\n*=============================================================================*\n");
    printf ("|                       >>>>Visualizacao de jogadores<<<<                      |\n");
    printf ("*=============================================================================*\n");
    printf ("                                                                               \n");
	retorno = fread(&j, sizeof j, 1, f);
	printf("\n | NICKNAME        | Password\n");
	while ( retorno == 1)
	{
		cont++;
		printf("\n  %s                 %s      \n", j.nick, j.pass);
		printf("\n");
		retorno= fread(&j, sizeof j, 1, f);
	}
	printf(" \n\n %d jogadores registados \n", cont);
	printf ("*=============================================================================*\n");
	fclose(f);
}

with this function i read all, this one is valid to use strcmp?

that looks like it should work, unless your file isn't organized into records that are the exact size of 'struct jogador'.

edit: are you saying that the function listarjog does print all the names and passwords? if so, i don't understand your question about strcmp