C++ for Dummies (3rd Edition)/C_FD.iso/BUDGETS/BUDGET2.CPP

C/C++ Source or Header | 1996-09-02 | 6KB | 215 lines

//BUDGET2.CPP - Budget program in the "C++ as a better C"
//              version.

#include <iostream.h>

//the maximum number of accounts you can have
const int maxAccounts = 10;

//Checking - this describes checking accounts
struct Checking
{
   unsigned accountNumber;
   float    balance;
} chkAcnts[maxAccounts];

//Savings - you can probably figure this one out
struct Savings
{
   unsigned accountNumber;
   float    balance;
   int      noWithdrawals;
} svgAcnts[maxAccounts];

//prototype declarations
void process(Checking &checking);      //Note 1
void process(Savings &savings);

//inline functions
//init(Checking) - initialize a checking account
inline void init(Checking &checking)   //Note 2
{
   cout << "Enter account number:";
   cin  >> checking.accountNumber;
   checking.balance = 0.0F;
}

//init(Savings) - initialize a savings account
inline void init(Savings  &savings)
{
   cout << "Enter account number:";
   cin  >> savings.accountNumber;
   savings.balance = 0.0F;
   savings.noWithdrawals = 0;
}

//main - accumulate the initial input and output totals
int main()
{
   //loop until someone enters an æXÆ or æxÆ
   int noChkAccounts = 0;    //count the number of accounts
   int noSvgAccounts = 0;
   char     accountType;     //S or C

   unsigned keepLooping = 1;
   while (keepLooping)
   {
      cout << "Enter S for Savings, "
              "C for Checking, X for exit\n";
      cin  >> accountType;

      switch (accountType)
      {
         case 'c':
         case 'C':
            if (noChkAccounts < maxAccounts)
            {
               init(chkAcnts[noChkAccounts]);
               process(chkAcnts[noChkAccounts]);
               noChkAccounts++;
            }
            else
            {
               cout << "No more room for checking accounts\n";
            }
            break;

         case 's':
         case 'S':
            if (noSvgAccounts < maxAccounts)
            {
               init(svgAcnts[noSvgAccounts]);
               process(svgAcnts[noSvgAccounts]);
               noSvgAccounts++;
            }
            else
            {
               cout << "No more room for savings accounts\n";
            }
            break;

         case 'x':
         case 'X':
            keepLooping = 0;
            break;

         default:
            cout << "I didn't get that.\n";
      }
   }

   //now present totals
   float chkTotal = 0.0F;      //total of all checking accounts
   cout << "Checking accounts:\n";
   for (int i = 0; i < noChkAccounts; i++)  //Note 3
   {
      cout << "Account " << chkAcnts[i].accountNumber
           << " = "      << chkAcnts[i].balance
           << "\n";
      chkTotal += chkAcnts[i].balance;
   }
   float svgTotal = 0.0F;      //total of all savings accounts
   cout << "Savings accounts:\n";
   for (i = 0; i < noSvgAccounts; i++)      //Note 4
   {
      cout << "Account "             << svgAcnts[i].accountNumber
           << " = "                  << svgAcnts[i].balance
           << " (no. withdrawals = " << svgAcnts[i].noWithdrawals
           << ")\n";
      svgTotal += svgAcnts[i].balance;
   }

   float total = chkTotal + svgTotal;
   cout << "Total for checking accounts = " << chkTotal << "\n";
   cout << "Total for savings accounts  = " << svgTotal << "\n";
   cout << "Total worth                 = " << total << "\n";
   return 0;
}

//process(Checking) - input the data for a checking account
void process(Checking &checking)
{
   cout << "Enter positive number for deposit,\n"
           "negative for check, 0 to terminate";

   float transaction;
   do
   {
      cout << ":";
      cin  >> transaction;

      //is it a deposit?
      if (transaction > 0.0F)
      {
         checking.balance += transaction;
      }

      //how about withdrawal?
      if (transaction < 0.0F)
      {
         //withdrawal
         transaction = -transaction;
         if (checking.balance < transaction)   //Note 5
         {
            cout << "Insufficient funds: balance "
                 << checking.balance
                 << ", check "
                 << transaction
                 << "\n";
         }
         else
         {
            checking.balance -= transaction;

            //if balance falls too low, charge service fee
            if (checking.balance < 500.00F)
            {
               checking.balance -= 0.20F;
            }
         }
      }
   } while (transaction != 0.0F);
}

//process(Savings) - input the data for a savings account
void process(Savings &savings)
{
   cout << "Enter positive number for deposit,\n"
           "negative for withdrawal, 0 to terminate";

   float transaction;
   do
   {
      cout << ":";
      cin  >> transaction;

      //is this a deposit?
      if (transaction > 0.0F)
      {
         savings.balance += transaction;
      }

      //is it a withdrawal?
      if (transaction < 0.0F)
      {
         transaction = -transaction;
         if (savings.balance < transaction)
         {
            cout << "Insufficient funds: balance "
                 << savings.balance
                 << ", withdrawal "
                 << transaction
                 << "\n";
         }
         else
         {
            if (++savings.noWithdrawals > 1)
            {
               savings.balance -= 5.00F;
            }
            savings.balance -= transaction;
         }
      }
   } while (transaction != 0.0F);
}