help with functions in Admin Interface

I have only been programming for about 7 weeks now and our current assignment is enormous. We have to make an Admin Interface that asks for a login and then verifies it. Then we have to show a full line up of options and do those as well. If anyone could help me with the admin login part it would be greatly appreciated. Here is the part I am not sure how to do.

There are supposed to be two seperate functions.

• ValidateAdmin
o This function receives the id and password, and validate if the id-password pair is valid
o If the id-password is valid, a true value is returned. Otherwise, a false value is returned instead
• AdminLogin 巳
o Prompt and accept a admin’s ID and password, and return this information to the calling function
o The ID and password returned to the calling function must be valid
o In case of the invalid ID-password pair entered, an error message must be displayed and a new input is prompted until a valid ID/password pair is provided

This is my code for them.....Any input would be great.

Code:

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bool ValidateAdmin() {
        ifstream AdminIn;
        string Id, Password, admin;
       
        AdminIn.open(admin.c_str(), ios::in);
       
        getline(AdminIn, Id);
        while(!AdminIn.eof()) {
        getline(AdminIn, Password);
                //clear screen and return to main menu.
                getline(AdminIn, Id);
        }
        if(Id !=Password){
                cout<<"Invalid user Id and password combination!";
                exit(1);
        }
       
        if(Id = EnterId && password = EnterPassword){
                ValidateAdmin = true
        else ValidateAdmin = false;
        }

        return ValidateAdmin;
}

string AdminLogin {
        string EnterId, EnterPassword;

        cout<<"*****  ADMIN LOGIN  *****";
        cout<<endl;
        cout<<endl;
        cout<<"Enter user ID:";
        cin<<EnterId;
        cout<<"Enter a password:";
        cin<<EnterPassword;
       
        return EnterId;
        return EnterPassword;

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What way should I be doing this to match the way he is explaining it?

Code:

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return EnterId;
return EnterPassword;

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I dont think that you can return two values to the calling function.you should declare a variable that concatenates the user name and password and send it to the calling function.

Code:

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if(Id = EnterId && password = EnterPassword){

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Lvalue required.