Thread: passing bye parts of program

in a currecnt program i am working on, i have places where the user would enter there first and last name. when i run the program, it completly passes bye that part and fills in all the other fields aswell. and then later when the name is ouputed it has no value.
here is the part of the code:

Code:

cout << "\n\nFirst Name: ";
     cin.get(V.FirstName,20);
     cin.ignore(80,'\n');
                      
     V.FirstName[0]=toupper(V.FirstName[0]);
                      
     cout << "\nLast Name: ";
     cin.get(V.LastName,30);
     cin.ignore(80,'\n');
                      
     V.LastName[0]=toupper(V.LastName[0]);
                 
     strcpy(V.FullName, V.FirstName);
     strcat(V.FullName, " ");
     strcat(V.FullName, V.LastName);

as you can see i use the cin.get and cin.ignore since they are character strings and i am using a struct which is why there is a V. and then variable name

also this is the first program i passed structs from one function to another

here is the struct:

Code:

struct Variables
{
   char FirstName[20], LastName[30], FullName[50], Password[10], PW[10], User, Print, acnumber[8];
   int Attempts;
   float Balance, Deposits, Withdrawls, NewBalance;
};

and here's main if you need it:

Code:

int main ()
{
   Variables V;
   
   V.Attempts=0;
   V.Balance=0;
   V.Deposits=0;
   V.Withdrawls=0;
   V.NewBalance=0;
   
   Intro(V);
   
   AccountNumber(V);
 
   createorisregistered(V); 
     
   printcorrect(V);
   
   getch();
   return 0;
}

can anyone explain why these things are being passed bye wen running the program? thanks for your help in advance.

It seems to work for me. This code produces the following output:

Code:

#include <iostream>
using namespace std;

struct Variables
{
   char FirstName[20], LastName[30], FullName[50], Password[10], PW[10], User, Print, acnumber[8];
   int Attempts;
   float Balance, Deposits, Withdrawls, NewBalance;
};


int main ()
{
	Variables V;

	V.Attempts=0;
	V.Balance=0;
	V.Deposits=0;
	V.Withdrawls=0;
	V.NewBalance=0;

	cout << "\n\nFirst Name: ";
	cin.get(V.FirstName,20);
	cin.ignore(80,'\n');
              
	V.FirstName[0]=toupper(V.FirstName[0]);
              
	cout << "\nLast Name: ";
	cin.get(V.LastName,30);
	cin.ignore(80,'\n');
              
	V.LastName[0]=toupper(V.LastName[0]);
         
	strcpy(V.FullName, V.FirstName);
	strcat(V.FullName, " ");
	strcat(V.FullName, V.LastName);

	cout<<V.FirstName<<endl;
	cout<<V.LastName<<endl;
	cout<<V.FullName<<endl;

	return 0;
}

output:

Code:

First Name: tom

Last Name: smith
Tom
Smith
Tom Smith
Press any key to continue

i think i am passing by reference...

heres all the code if it helps:

Code:

//Dan Kemper
//Intermediate Computer Programming
//This is a bank program

//includes header files
#include <conio.h>
#include <iostream>	
#include <fstream>	
#include <iomanip>
#include <windows.h>
#include <cctype>	

//required for cout and cin
using namespace std;	

struct Variables
{
   char FirstName[20], LastName[30], FullName[50], Password[10], PW[10], User, Print, acnumber[8];
   int Attempts;
   float Balance, Deposits, Withdrawls, NewBalance;
};

void Intro(Variables &V);

void AccountNumber(Variables &V);

void SignIn(Variables &V);

void ifcorrect(Variables &V);

void createorisregistered(Variables &V);

void ifincorrect(Variables &V);

void createaccount(Variables &V);

void printcorrect(Variables &V);

int main ()
{
   Variables V;
   
   V.Attempts=0;
   V.Balance=0;
   V.Deposits=0;
   V.Withdrawls=0;
   V.NewBalance=0;
   
   Intro(V);
   
   AccountNumber(V);
 
   createorisregistered(V); 
     
   printcorrect(V);
   
   getch();
   return 0;
}

void Intro(Variables &V)
{ 
   cout << "       AAA         TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT\n";
   cout << "      AAAAA        TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT\n";
   cout << "     AAA AAA            TTTTTT      MMMMMM         MMMMMM\n";
   cout << "    AAA   AAA           TTTTTT      MMM MMM       MMM MMM\n";
   cout << "   AAAAAAAAAAA          TTTTTT      MMM  MMM     MMM  MMM\n";
   cout << "  AAAAAAAAAAAAA         TTTTTT      MMM   MMM   MMM   MMM\n";
   cout << " AAA         AAA        TTTTTT      MMM    MMM MMM    MMM\n";
   cout << "AAA           AAA       TTTTTT      MMM     MMMMM     MMM\n";
   cout << "\nThis is a bank program.\n";
   cout << "\nPress [ENTER] to continue...\n";
   cin.get();
   system("cls");
   
   cout << "Are you a registered user (A), or would you like to create an account (B)? ";
   cin >> V.User;
   system("cls");
}

void createorisregistered(Variables &V)
{
   if (V.User=='a' || V.User=='A')
   {
      SignIn(V);
                 
                 if (V.Password==V.PW)
                 {
                    ifcorrect(V);
                 }
                 if (V.Password!=V.PW)
                 {
                    ifincorrect(V);
                 }
   }
   
   if (V.User=='b' || V.User=='B')
   {
      createaccount(V);
   }
}

void SignIn(Variables &V)
{     
     ifstream infile; //declares file pointer named infile
     infile.open("Password.dat",ios::in); //opens dat file which has password in it
     infile.get(V.PW,10); //gets password from file
     infile.ignore(80, '\n');
     infile.close();
                 
     infile.open("Balance.dat",ios::in);
                 
     cout << "First Name: ";
     cin.get(V.FirstName,20);
     cin.ignore(80,'\n');

     V.FirstName[0]=toupper(V.FirstName[0]);
                 
     cout << "\nLast Name: ";
     cin.get(V.LastName,30);
     cin.ignore(80,'\n');
                 
     V.LastName[0]=toupper(V.LastName[0]);
                 
     strcpy(V.FullName, V.FirstName);
     strcat(V.FullName, " ");
     strcat(V.FullName, V.LastName);
                 
     system("cls");
                 
     cout << V.FullName << ", what is your password: ";
     cin.get(V.Password,10);
     cin.ignore(80, '\n');
     cout << V.PW; 
     getch();
     system("cls");
}

void ifcorrect(Variables &V)
{
     cout << "Account Number: " << V.acnumber << "\n";
     cout << "Balance: " << V.NewBalance;
     cout << "\n\nDeposits: ";
     cin >> V.Deposits;
     cout << "\n\nWithdrawls: ";
     cin >> V.Withdrawls;
     cout << "\n\nNew Balance: " << V.NewBalance;
     cout << "\n\n" << V.FullName << ", is all the above information correct (Y/N)? ";
     cin >> V.Print;
}

void ifincorrect(Variables &V)
{
     do
     {
         cout << "\n\nThat was the incorrect password!\a\a\a";
         getch();
         system("cls");
         cout << "Try again: ";
         cin >> V.Password;
         if (V.Password==V.PW)
         {
              break;
         }
         if (V.Attempts==3)
         {
         cout << "I'm sorry, but you have made too many incorrect attempts. Please try again later.";
         }
         V.Attempts++;
         }
         while (V.Attempts<=3);
}

void createaccount(Variables &V)
{
     cout << "Your account number will be: " << V.acnumber;
     cout << "\n\nFirst Name: ";
     cin.get(V.FirstName,20);
     cin.ignore(80,'\n');
                      
     V.FirstName[0]=toupper(V.FirstName[0]);
                      
     cout << "\nLast Name: ";
     cin.get(V.LastName,30);
     cin.ignore(80,'\n');
                      
     V.LastName[0]=toupper(V.LastName[0]);
                 
     strcpy(V.FullName, V.FirstName);
     strcat(V.FullName, " ");
     strcat(V.FullName, V.LastName);
                      
     system("cls");
                      
     cout << V.FullName << ", pick your password and don't forget it: ";
     cin.get(V.Password, 10);
     cin.ignore(80, '\n');
     cout << "\nAccount Number: " << V.acnumber;
     cout << "\nDeposits: ";
     cin >> V.Deposits;
     cout << "\nWithdrawls: ";
     cin >> V.Withdrawls;
                      
     V.NewBalance=V.Balance+V.Deposits-V.Withdrawls;
                      
     cout << "\nBalance: ";
     cout << setiosflags (ios::fixed) << setprecision(2) << V.NewBalance ;
     cout << "\n\n" << V.FullName << ", is all the above information correct (Y/N)? ";
     cin >> V.Print;
}

void printcorrect(Variables &V)
{
     if (V.Print=='y' || V.Print=='Y') 
     { 
     ofstream outfile ("Bank.txt");
     outfile << V.FullName;
     outfile << "\nPassword: *******";
     outfile << "\n\nDeposits: " << V.Deposits;
     outfile << "\nBalance: " << V.Deposits;
     outfile << "\nThank you!";
     outfile.close();
     ofstream  pwfile ("Passwords.dat");
     pwfile << V.Password;
     pwfile.close();
     ofstream balancefile ("Balance.dat");
     balancefile << V.NewBalance; 
     cout << "\n\nThank You!\a";
     }
}

void AccountNumber(Variables &V)
{
   srand((unsigned)time(0)); 
   for ( int i = 0; i < 8; i++ )
   {
      V.acnumber[i] = rand() % 10 + '0';
   }
   V.acnumber[7] = '\0';
}