debugging03.cpp

《c＋＋大学教程实验指导书》源码

// Chapter 3 of C++ How to Program
// Debugging problem

#include <iostream>

using std::cout;
using std::endl;

#include <ctime>

#include <cstdlib>

enum Months { JAN = 1, FEB, MAR, APR, MAY, JUN,
              JUL, AUG, SEP, OCT, NOV, DEC };

void generateDate( int &, int &, int );
void printDate( Months, int, int );
int validDate( int, int );

int main()
{
   int month = 1;
   int day = 1;
   int year = 1900;

   srand( time( 0 ) );

   printDate( month, day, year );
   year = getYear( year );
   getMonth();
   day = getDay();

   if ( validDate( month, day, year ) == true )
      printDate( month, day, year );
   
   return 0;

} // end main

// return month
int getMonth()
{
   Month myMonth = rand() % 12 + 1;

   return myMonth;

} // end getMonth

// return year
int getYear( int aYear )
{
   return rand() % 101 + 1900;

} // end getYear

// return day
void getDay() 
{ 
   return rand() % 31 + 1; 

} // end getDay

// output date
void printDate( Months month, int day, year );
{
   switch ( month ) {

      case JAN:
         cout << "January " << day << ", " << year << endl;

      case FEB:
         cout << "February " << day << ", " << year << endl;
         break;

      case MAR:
         cout << "March " << day << ", " << year << endl;
         break;

      case APR:
         cout << "April " << day << ", " << year << endl;
         break;
      case MAY:
         cout << "May " << day << ", " << year << endl;
         break;

      case JUN:
         cout << "June " << day << ", " << year << endl;
         break;

      case JUL:
         cout << "July " << day << ", " << year << endl;
         break;

      case AUG:
         cout << "August " << day << ", " << year << endl;
         break;

      case SEP:
         cout << "September " << day << ", " << year << endl;
         break;
      case OCT:
         cout << "October " << day << ", " << year << endl;
         break;

      case NOV:
         cout << "November " << day << ", " << year << endl;
         break;

      case DEC:
         cout << "December " << day << ", " << year << endl;
         break;

      default:
         cout << "invalid month\n";

   } // end switch

} // end printDate

// check for validDate
bool validDate( int month, int day, int year )
{
   int month;
   int day;
   int year;

   if ( year < 1900 || year > 2001 )
      return false;

   else if ( month < 1 || month > 12 )
      return false;
   else if ( day < 1 || day > 31 )
      return false;

   else if ( day == 31 && month == APR || month == JUN
             || month == SEP || month == NOV )
      return false;

   else if ( month == 2 && day > 28 )
      return false;

} // end validDate


/**************************************************************************
 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
 * Hall. All Rights Reserved.                                             *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
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 * programs or to the documentation contained in these books. The authors *
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 * furnishing, performance, or use of these programs.                     *
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