student.cpp

《c＋＋大学教程实验指导书》源码

// Chapter 7 of C++ How to Program
// Debugging Problem (student.cpp)

#include <iostream>

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

#include <iomanip>

using std::setw;

#include <cstring>

#include "student.h"

#include <new>
static int numStudents = 0;

// constructor
Student::Student( const char *nPtr )
{
   grades = new int[ 1 ];
   grades[ 0 ] = 0;
   name = new char[ strlen( nPtr ) + 1 ];
   strcpy( name, nPtr );
   numGrades = 0;
   numStudents++;

   cout << "A student has been added\n";

} // end class Student constructor

// destructor
Student::~Student()
{
   cout << name << " has been deleted\n";
   delete grades;
   delete name;
   numStudents--;

} // end class Student destructor

// function displayGrades definition
void Student::displayGrades() const
{
   cout << "Here are the grades for " << name << endl;
   
   // output each grade
   for ( int i = 0; i < numGrades; i++ )
      cout << setw( 5 ) << grades[ i ];

   cout << endl << endl;

} // end function displayGrades

// function addGrade definition
Student Student::addGrade( int grade ) const
{
   int *temp = new int[ numGrades + 1 ];
   
   for ( int i = 0; i < numGrades; i++ )
      temp[ i ] = grades[ i ];

   temp[ numGrades ] = grade;
   grades = temp;
   numGrades++;

   return this;

} // end function addGrade

// function getNumStudents definition
static int Student::getNumStudents()  
{
   return numStudents;

} // end function getNumStudents

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 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
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