If....else password statement

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If....else password statement

 
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  #1
Dec 6th, 2004
I am having a little trouble incorporating a simple password into a voting machine style program. If anybody can see what's wrong with it and point it out, I would be very grateful.

C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <iomanip>
  3. #include<string>
  4. #include<cstdlib>
  5.  
  6. using namespace std;
  7.  
  8. int main()
  9. {
  10.    char choice;
  11.    string password = "jim";
  12.    string guess = "";
  13.  
  14. do
  15.    {
  16.       system("color F0");
  17.       system("CLS");
  18.       cout << "\n\n\n\n";
  19.  
  20.  
  21.       cout << setw(50) << "Voting Menu";
  22.       cout << endl << setw(40) << " George W. Bush" << ": 1 " ;
  23.       cout << endl << setw(40) << " John F. Kerry" << ": 2 ";
  24.       cout << endl << setw(40) << "  EXIT" << ": 3 " << endl;
  25.       cout << endl << endl << setw(40) << "Please enter your choice :";
  26.       cin >> choice;
  27.       cin.get();
  28.  
  29.       switch( choice)
  30.       {
  31.          case '1': system("CLS");
  32.                    cout << "\n\n\n\n";
  33.                    cout << setw(50) << "Thank you for voting. " << endl;
  34.                    cin.get();
  35.                    break;
  36.  
  37.          case '2': system("CLS");
  38.                    cout << "\n\n\n\n";
  39.                    cout << setw(50) <<"Thank you for voting" << endl;
  40.                    cin.get();
  41.                    break;
  42.  
  43.          case '3': system("CLS");
  44.                    cout << "\n\n\n\n";
  45.                    cout << setw(50) <<"Please enter supervisors password :" ;
  46.                    cin >> guess;
  47.  
  48.  
  49.          if(guess == password)
  50.          {
  51.  
  52.              cout << endl << endl << endl << setw(10) << ""
  53.            << "Are you sure you want to quit and start counting votes? <Y/N> " << endl;
  54.  
  55.  
  56.        }    
  57.  
  58.  
  59.               else 
  60.            {
  61.                cin.get();
  62.            }            
  63.  
  64.        case '4': break;
  65.  
  66. }                     
  67.  
  68.  
  69.    }while( choice != '4');
  70.  
  71.    return 0;
  72. }

See after if(guess == password), it must revert back to the original screen if the password is incorrect. If the password is correct it will continue onto a Y/N option.

There's much more to do but I should be able to complete those parts on my own...hopefully.
BTW, is there a tutorial that explains simple Y/N parts?
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Re: If....else password statement

 
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  #2
Dec 7th, 2004
u have given a case `4`: but u haven`t displayed it on the menu.
u must go on calculating while the voting is going on
e.g; if the
case is `1` then gw++
where gw is a counter for George Bush

similaraly for case `2` keep a separate conter.

when u r asking the user to count the votes
i.e; cout << endl << endl << endl << setw(10) << ""
<< "Are you sure you want to quit and start counting votes? <Y/N> " << endl;

then take the user`s choice as input
e.g; cin>>ans;

now check if(ans==`y` or ans == `Y`)
{then simply display the results
i.e; cout<<gw; and the other one
and then come out of the loop by using : break;
}
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Re: If....else password statement

 
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  #3
Dec 8th, 2004
Besides, you do not have a break statement for case 3. You need to put break statements for each case.
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Re: If....else password statement

 
-1
  #4
Dec 8th, 2004
#include <iostream>
#include <iomanip>
#include<string>
#include<cstdlib>

using namespace std;

int main()
{
char choice;
string password = "jim";
string guess = "";

do
{
system("color F0");
system("CLS");
cout << "\n\n\n\n";


cout << setw(50) << "Voting Menu";
cout << endl << setw(40) << " George W. Bush" << ": 1 " ;
cout << endl << setw(40) << " John F. Kerry" << ": 2 ";
cout << endl << setw(40) << " EXIT" << ": 3 " << endl;
cout << endl << endl << setw(40) << "Please enter your choice :";
cin >> choice;
cin.get();

switch( choice)
{
case '1': system("CLS");
cout << "\n\n\n\n";
cout << setw(50) << "Thank you for voting. " << endl;
cin.get();
break;

case '2': system("CLS");
cout << "\n\n\n\n";
cout << setw(50) <<"Thank you for voting" << endl;
cin.get();
break;

case '3': system("CLS");
cout << "\n\n\n\n";
cout << setw(50) <<"Please enter supervisors password :" ;
cin >> guess;


if(guess == password)
{

cout << endl << endl << endl << setw(10) << ""
<< "Are you sure you want to quit and start counting votes? <Y/N> " << endl;


}


else
{
cin.get();
}

case '4': break;

}


}while( choice != '3');

return 0;
}

email me if you have any problems on yb1pls@yahoo.co.uk
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Re: If....else password statement

 
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  #5
Dec 8th, 2004
To yb1pls: Use code tags when you are posting some code - http://www.daniweb.com/techtalkforum...nouncementid=3
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Re: If....else password statement

 
0
  #6
Dec 8th, 2004
This is a little update... Thanks for the replies guys.

C++ Syntax (Toggle Plain Text) 
  1. #include <iostream>
  2. #include <iomanip>
  3. #include<string>
  4. #include<cstdlib>
  5.  
  6. using namespace std;
  7.  
  8. int main()
  9. {
  10.    char choice;
  11.    string correctpassword = "jim";
  12.    string password = "";
  13.    char ans;
  14.    int gwb = 0;
  15.    int jfk = 0;
  16.  
  17. do
  18.    {
  19.       system("color F0");
  20.       system("CLS");
  21.       cout << "\n\n\n\n";
  22.  
  23.  
  24.       cout << setw(50) << "Voting Menu";
  25.       cout << endl << setw(40) << " George W. Bush" << ": 1 " ;
  26.       cout << endl << setw(40) << " John F. Kerry" << ": 2 ";
  27.       cout << endl << setw(40) << "  EXIT" << ": 3 " << endl;
  28.       cout << endl << endl << setw(40) << "Please enter your choice :";
  29.       cin >> choice;
  30.       cin.get();
  31.  
  32.       switch( choice)
  33.       {
  34.          case '1': system("CLS");
  35.                    cout << "\n\n\n\n";
  36.                    cout << setw(50) << "Thank you for voting. " << endl;
  37.                    cin.get();
  38.                    break;
  39.  
  40.                    cout << setw(30) <<"Please enter supervisors password to enable next voter:" ;
  41.                    getline(cin, password);
  42.  
  43.  
  44.  
  45.  
  46.          case '2': system("CLS");
  47.                    cout << "\n\n\n\n";
  48.                    cout << setw(50) <<"Thank you for voting" << endl;
  49.                    cin.get();
  50.                    break;
  51.  
  52.                     if(choice == 1)
  53.                                {
  54.                                  gwb = gwb + 1;
  55.                                  }
  56.                             else if(choice == 2)
  57.                             {
  58.                               jfk = jfk + 1;
  59.                               }
  60.  
  61.  
  62.          case '3': system("CLS");
  63.                    cout << "\n\n\n\n";
  64.                    cout << setw(50) <<"Please enter supervisors password :" ;
  65.                    getline(cin, password);
  66.  
  67.  
  68.          if(password != correctpassword)
  69.          {
  70.                cout << "\n\n\n\n";
  71.                cout << setw(50) <<"Please enter supervisors password :" ;
  72.                getline(cin, password);
  73.  
  74.          }
  75.  
  76.          else 
  77.            {
  78.                cout << endl << endl << endl << setw(10) << ""
  79.            << "Are you sure you want to quit and start counting votes? <Y/N> " << endl;
  80.            cin >> ans; 
  81.  
  82.  
  83.             cout << setw(30) << "Totals for this election. ";
  84.             cout << endl << setw(40) << " George W. Bush: " << "\n\n\n" << gwb ;
  85.             cout << endl << setw(40) << " John F. Kerry: " << "\n\n\n" << jfk ;
  86.                   }           
  87.  
  88.        break;      
  89.      }                  
  90.  
  91.  
  92. }while( choice != '4');
  93.  
  94.  
  95. cin.get();
  96. return 0;
  97. }

What I don't know how to do is the little (Yes/No) feature. I googled it but no luck. Does is work like my password?

Marauder,
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Re: If....else password statement

 
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  #7
Dec 8th, 2004
Did you know you have unreachable code?
      switch ( choice )
      {
      case '1': system("CLS");
         cout << "\n\n\n\n";
         cout << setw(50) << "Thank you for voting. " << endl;
         cin.get();
         break;

         cout << setw(30) <<"Please enter supervisors password to enable next voter:" ;
         getline(cin, password);

      case '2': system("CLS");
         cout << "\n\n\n\n";
         cout << setw(50) <<"Thank you for voting" << endl;
         cin.get();
         break;

         if ( choice == 1 )
         {
            gwb = gwb + 1;
         }
         else if ( choice == 2 )
         {
            jfk = jfk + 1;
         }
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Re: If....else password statement

 
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  #8
Dec 14th, 2004
Incorporating the vote counting into the switch statement will solve one of the unreachable segments

#include <iostream>
#include <iomanip>
#include<string>
#include<cstdlib>

using namespace std;

int main()
{
   char choice;
   string correctpassword = "jim";
   string password = "";
   char ans;
   int gwb = 0;
   int jfk = 0;
   
do
   {
      system("color F0");
      system("CLS");
      cout << "\n\n\n\n";


      cout << setw(50) << "Voting Menu";
      cout << endl << setw(40) << " George W. Bush" << ": 1 " ;
      cout << endl << setw(40) << " John F. Kerry" << ": 2 ";
      cout << endl << setw(40) << "  EXIT" << ": 3 " << endl;
      cout << endl << endl << setw(40) << "Please enter your choice :";
      cin >> choice;
      cin.get();

      switch( choice)
      {
         case '1': system("CLS");
                   gwb++;
                   cout << "\n\n\n\n";
                   cout << setw(50) << "Thank you for voting. " << endl;
                   cin.get();
                   break;
                                                     
         case '2': system("CLS");
                   jfk++;
                   cout << "\n\n\n\n";
                   cout << setw(50) <<"Thank you for voting" << endl;
                   cin.get();
                   break;
                    
/* Should this not be after the switch so that you are asked AFTER the program has analyzed the choice?

                cout << setw(30) <<"Please enter supervisors password to enable next voter:" ;
                   getline(cin, password);
                   
*/
         case '3': system("CLS");
                   cout << "\n\n\n\n";
                   cout << setw(50) <<"Please enter supervisors password :" ;
                   getline(cin, password);
         
                   
         if(password != correctpassword)
         {
               cout << "\n\n\n\n";
               cout << setw(50) <<"Please enter supervisors password :" ;
               getline(cin, password);
              
         }
           
         else 
           {
               cout << endl << endl << endl << setw(10) << ""
           << "Are you sure you want to quit and start counting votes? <Y/N> " << endl;
           cin >> ans; 
           
      
            cout << setw(30) << "Totals for this election. ";
            cout << endl << setw(40) << " George W. Bush: " << "\n\n\n" << gwb ;
            cout << endl << setw(40) << " John F. Kerry: " << "\n\n\n" << jfk ;
                  }           
       
       break;      
     }                  
   
   
}while( choice != '4');


cin.get();
return 0;
}
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Re: If....else password statement

 
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  #9
Dec 14th, 2004
btw cant you use another mini switch block for the Y/N problem????

ie, get the string (answer) and try something like the following...

C++ Syntax (Toggle Plain Text) 
  1. switch (answer)
  2. {
  3.     case 'y':
  4.     case 'Y':
  5.     {
  6.         // User says yes, do something
  7.     }
  8.     break;
  9.  
  10.     case 'n':
  11.     case 'N':
  12.     {
  13.         // User said no, do something else
  14.     }
  15.     break; 
  16.     default:
  17.     {
  18.         // didnt understand / error
  19.     }
  20.     break;
  21. }

this could probably be #define'd or put in a function so that it tidies up the code a bit

hope this helps..
Last edited by 1o0oBhP; Dec 14th, 2004 at 2:05 am. Reason: addition
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Re: If....else password statement

 
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  #10
Dec 14th, 2004
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Originally Posted by nvanevski
Besides, you do not have a break statement for case 3. You need to put break statements for each case.
Funny way to do it, but case 4 provides the break for case 3
May 'the Google' be with you!
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