Thread: Reading from a files as a string

http://faq.cprogramming.com/cgi-bin/...&id=1043284351
Btw, you can use a virtual machine for testing your app at home.
Although the link is for C, the same solution applies to C++ as well (reading using the >> operator).

Originally Posted by PAragonxd

Setting up a virtual machine seems complicated, but I'll look into it

Well, I imagine it might be on Linux, but on the other hand, it can't be that difficult.

Meanwhile, would this work?

Code:

void getPass(string userName) {
	string tempName, password;

	ifstream userNameDB("users.data");

	for (int i = 0; (userNameDB >> tempName); i = i + 2) {
		userNameDB >> tempName;

		if (tempName == userName) {
			i++;
			userNameDB >> password;
			userNameDB.close();
			logInPASS(userName, password);
		}
			
	}
	
        userNameDB.close();
	cout << endl << "Error fetching password for " << userName << "." << endl;
	writeError(1);
	
	return -1;
}

Nope, it will absolutely not work, because you're reading twice.
userNameDB >> tempName; // Reads user
userNameDB >> tempName; // Reads pass
if (tempName == userName) // Fails

This program should work just fine with your Windows XP machine - there is nothing machine/OS specific in the way your code works, so why not just run it as a Windows console application. That is a 10x simpler solution than virtual machines or such, and as long as you are not depending on OS-specific functionality (that is, you are using standard C/C++ functionality), it shouldn't make any difference.

--
Mats