fstream

[michy]

hi there,
Currently im creating a login program. im using fstream to do this program, so i save my data in a text file. Im able to save data into the file, in the file you will see something like:
username:password:level

when i want to retreive the data from it, i will face a problem that:

ifstream login(FileName);
login >> username >> password >> level;

i'll get a result:
username = username:password:level
password = null
level = null (means nth)

so how i gonna solve this problem?
sorry for the weak English skill.

[Bazzy]

if they are all strings you can try this:

getline(login,username,':');
getline(login,password,':');
getline(login,level,':');

instead of >>

[michy]

i have tried what you have said but i get error:
login undeclared identifier

this is my code:

ifstream login("filename");
ifstream.open("filename");
getline(login,username,':');
getline(login,password,':');
getline(login,level,':');
ifstream.close();

what wrong with it? please correct me thx alot.

[Bazzy]

On lines 2 and 6 you have to use login instead of ifstream
Are you including all the required headers?

[michy]

Thx alot i have solve the problem. now i facing a new problem =P

cout << "Enter username to search for password: ";
cin >> search;
ifstream login;
login.open("filename");
getline(login,username,':');
getline(login,password,':');
getline(login,level,':');

while (username != search)
{
getline(login,username,':');   <== i have tried put a "cout << username;" and get the same value with my "search" but still continue looping.
getline(login,password,':');
getline(login,level,':');
}

login.close();

and i get a result is non-stop looping...why?

[blackcoder41]

in line 9.. that is not the way to compare std::string.. please see this http://cplusplus.com/reference/string/string/compare/

and what is the data type of your search variable?

[michy]

my search is string.

and i have change my code to :

cout << "Enter username to search for password: ";
cin >> search;
ifstream login;
login.open("filename");
getline(login,username,':');
getline(login,password,':');
getline(login,level,':');

while (!login.eof() && username.compare(search) != 0)   <== changed this
{
getline(login,username,':');
getline(login,password,':');
getline(login,level,':');
}

login.close();

but i still cant get the pass it will search through all the data and dont get the username.

[blackcoder41]

maybe the username has spaces on it.. getline(cin, search) to get input.. in line 2

[Bazzy]

while (username != search) is perfectly fine
http://cplusplus.com/reference/string/operators/
How did you declare search?

[blackcoder41]

@Bazzy
oh yeah.. i forgot it has overloaded operators.. my mistake..

[michy]

How did you declare search?
string search;

Thx for the help i have done those part.

Here come a new problem i get:

cout << "Username: ";
getline(cin,username);
cout << "Password: ";
getline(cin,password1);
cout << "Comfirm Password: ";
getline(cin,password2);

above is the code i use to create account. but when i run till this part i will get output like this:

Username: Password: abc
Comfirm Password: abc

'abc' is i key in myself but why i cant key in username?

[blackcoder41]

show us more of code.. maybe you can give a sample text file.. i didn't understand your last post..

[Bazzy]

Are you mixing >> and getline with cin?

[michy]

My code :

                              ifstream Create;
					Create.open("filename");

					cout << "New username: ";
					getline(cin,user);

					while (! Create.eof() && user.compare(username) != 0){
						getline (Create, username, ':');
						getline (Create, x);
						if (user.compare(username) == 0){
							cout << "The username already exist!" << endl;
							cout << "Please try again later!" << endl;
							system("PAUSE");
							return(0);
						}
					}
					Create.close();

					cout << "Password: ";
					getline(cin,pass1);
					cout << "Comfirn Password: ";
					getline(cin,pass2);

					count = 0;
					while (pass1.compare(pass2) != 0){
						cout << endl << endl << endl <<"THE PASSWORDS ARE NOT SAME!" << endl;
						cout << "PLEASE KEY IN AGAIN!" << endl;
						cout << "Password: ";
						getline(cin,pass1);
						cout << "Comfirn Password: ";
						getline(cin,pass2);
						if (count > 1){
							cout << "Please CHECK your password!" << endl;
							system("PAUSE");
							return(0);
						}
						count = count + 1;
					}

after my program run to this part, i will get an output:
New Username: Password:

The program will skip enter username part and ask for password. Hope you understand my sad English.

[blackcoder41]

try to add this code cin.ignore(256); on top of cout << "New username: "; if it works Bazzy must be right, you're mixing >> and getline()

[michy]

err i added cin.ignore(256); but when the program come to this part it will get nth,
it wont print New Username: and others. Just hang there but i can type smth @@

what do you mean by mixing >> and getline()
means that when i used getline() i can't use cin>> x; anymore ? ?

[blackcoder41]

please see this..
http://www.cplusplus.com/forum/articles/6046/


and can you post the your whole code.. i can't guess your problem.

[michy]

hi, its me again =)...
i have solve the problems and now i want to get a time for salting.
but all the website example are in printf( .... )

can show me how to get the time format?
Example 12:20:30(hh:mm:ss) i want to change it into format like this:
122030 just numbers ignore :

what i have tried is:

char times;
_strtime(times)
Saving << username << ":" << password << ":" << ("%h%m%s",times) << endl;     <= this part is fstream i wan to save into text file.

with the code above i will get time format hh:mm:ss and still apear :
hope you understanding my problem...

[Bazzy]

I assume you got the time in a tm pointer:

char times[7];
times = strftime ( times, 7, "%H%M%S",  mytm );

Saving << username << ":" << password << ":" << times << endl;

[blackcoder41]

#include <iostream>
#include <stdio.h>
#include <time.h>
using namespace std;

int main() {
    time_t current_time = time(NULL);
    tm*  timex = localtime( &current_time );
    cout << "hour: "   << timex->tm_hour << endl;
    cout << "minute: " << timex->tm_min << endl;
    cout << "sec: "    << timex->tm_sec << endl;
    return 0;
}

http://cplusplus.com/reference/clibrary/ctime/tm/
http://cplusplus.com/reference/clibrary/ctime/time/
http://cplusplus.com/reference/clibrary/ctime/localtime/