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CS2370 Lab 5

By: mattfong on May 9th, 2011  |  syntax: None  |  size: 2.43 KB  |  hits: 50  |  expires: Never
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  1. //Matthew Fong
  2. //05/09/2011
  3. //Chapter 17 Exceptions
  4. //Description:  Shows the use of throw and catch for exceptions
  5. //overDrawn (withdrawing more than in account)
  6. //warningError (close to 0 balance, issue if $5 left in the account).
  7. #include <iostream>
  8. #include <string>
  9. using namespace std;
  10.  
  11. void findBalance(char t, float a, float &b);
  12.  
  13. class OverDrawnError
  14. {
  15.     private:
  16.         float balance;
  17.         string s;
  18.  
  19.     public:
  20.         OverDrawnError(float b)
  21.         {
  22.             balance = b;
  23.             s = "You can't withdraw this much because you will overdraw";
  24.         }
  25.  
  26.         void getOverDraw()
  27.         {
  28.             cout << "Balance: $" << balance << endl;
  29.             cout << "WARNING: " << s << endl;
  30.         }
  31. };
  32.  
  33. class WarningError
  34. {
  35.     private:
  36.         string s;
  37.         float balance;
  38.     public:
  39.         WarningError(float b)
  40.         {
  41.             balance = b;
  42.             s = "You will have less than $5 in your account after withdrawing";
  43.         }
  44.  
  45.         void getWarning()
  46.         {
  47.             cout << "Balance: $" << balance << endl;
  48.             cout << "WARNING: " << s << endl;
  49.         }
  50. };
  51.  
  52. int main()
  53. {
  54.     char trans;
  55.     float amount;
  56.     char flag = 'Y';
  57.     float balance = 0.0;
  58.  
  59.     do
  60.     {
  61.         cout << "Enter a transaction (W or D) and an amount: " << endl;
  62.         cin >> trans >> amount;
  63.  
  64.         try
  65.         {
  66.             findBalance(trans, amount, balance);
  67.             cout << "Balance: $" << balance << endl;
  68.         }
  69.         catch(OverDrawnError o) //catches the error
  70.         {
  71.             o.getOverDraw(); //shows the balance and error
  72.             return 1;
  73.         }
  74.         catch(WarningError w) //catches the error
  75.         {
  76.             w.getWarning(); //shows the balance and the warning
  77.             //I took out the return 1 just in case the person would like to keep withdrawing
  78.         }
  79.         cout << "Would you like another transaction? Y/N" << endl;
  80.         cin >> flag;
  81.     } while(flag == 'Y' || flag == 'y');
  82.  
  83.     return 0;
  84. }
  85.  
  86. void findBalance(char t, float a, float &b)
  87. {
  88.     if(t == 'w' || t == 'W')
  89.     {
  90.         b = b - a;
  91.  
  92.         if(b <= 0) //If the balance is 0 or less
  93.             throw OverDrawnError(b); //Throws overdrawing error
  94.  
  95.         if(b <= 5) //if the balance is 5 or less
  96.             throw WarningError(b); //Throws warning error
  97.     }
  98.  
  99.     if(t == 'd' || t == 'D')
  100.     {
  101.         b = b + a;
  102.     }
  103. }
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