Turbo C++ Login Program

[Moshi]

I made a login program on CppDroid then tried to reconstruct it for turbo c++ 3.2 use, well, i failed. So can someone give me hints on getting this right.

Here's my code it works yeah but not on turbo c++ :(

    #include <iostream>
//#include <iostream.h>
//#include <conio.h>
//#include <string.h>
using namespace std;

int main()
{
    string use = "", pass = "";
    string user, password;
    int i;
    
    user = "admin";
    password = "1234";

    for (i = 0; i < 3; i++)
    {
        //clrscr();
        cout << "Please enter username: ";
        cin >> use;
        cout << "\nPlease enter password: ";
        cin >> pass;
        
        if (use == user && pass == password)
        {
            cout << "\nWelcome -insert- to Infinity Tower!";
            //getch();
            return 0;
        }
        else if(i > 2)
        {
            return 1;
        }
    }
}

[Chervil]

I don't think Turbo C++ knows anything about namespace std. More problematic, I don't think it has the string class that is part of standard C++. Back in those dusty ancient days when Turbo C++ was written for DOS and later the new-fangled Windows 3.1, such things had hardly been dreamed of - at least they were not standardised at that time.

[Moshi]

Yes i just learned that when browsing through forums. I tried it using array, can't get it to work properly using arrays.

[Peter87]

Using char arrays is how they handled strings in C so you can probably find more about it if you study some C resources.

For comparing two char arrays you probably want to use the strcmp function.
http://www.cplusplus.com/reference/cstring/strcmp/

For copying strings you could use the strcpy function.
http://www.cplusplus.com/reference/cstring/strcpy/

Note that you need to be much more careful when doing it this way. Arrays don't automatically resize themselves so you have to make sure you make them large enough.

[Chervil]

You need to use the C-string functions such as strcpy(), strcmp() etc
http://www.cplusplus.com/reference/cstring/strcpy/
http://www.cplusplus.com/reference/cstring/strcmp/

Tested on TC 3.0

#include <iostream.h>
#include <conio.h>
#include <string.h>


int main()
{
    char use[30]  = "";
    char pass[30] = "";
    char user[30];
    char password[30];
    int i;

    strcpy(user, "admin");
    strcpy(password, "1234");

    for (i = 0; i < 3; i++)
    {
        clrscr();
        cout << "Please enter username: ";
        cin >> use;
        cout << "\nPlease enter password: ";
        cin >> pass;

        if ( !strcmp(use, user) && !strcmp(pass, password) )
        {
            cout << "\nWelcome " << use << " to Infinity Tower!";
            getch();
            return 0;
        }
        else if (i > 2)
        {
            return 1;
        }
    }
    return 0;
}

[Moshi]

Thanks for the answers and references, really helped me understand strings in old compilers.