fig08_06.cpp

《c＋＋大学教程》源码

// Fig. 8.6: fig08_06.cpp
// Array class test program.
#include <iostream>

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

#include "array1.h"

int main()
{
   Array integers1( 7 );  // seven-element Array
   Array integers2;       // 10-element Array by default

   // print integers1 size and contents
   cout << "Size of array integers1 is " 
        << integers1.getSize()
        << "\nArray after initialization:\n" << integers1;

   // print integers2 size and contents
   cout << "\nSize of array integers2 is " 
        << integers2.getSize()
        << "\nArray after initialization:\n" << integers2;

   // input and print integers1 and integers2
   cout << "\nInput 17 integers:\n";
   cin >> integers1 >> integers2;

   cout << "\nAfter input, the arrays contain:\n"
        << "integers1:\n" << integers1
        << "integers2:\n" << integers2;

   // use overloaded inequality (!=) operator
   cout << "\nEvaluating: integers1 != integers2\n";

   if ( integers1 != integers2 )
      cout << "integers1 and integers2 are not equal\n";

   // create array integers3 using integers1 as an
   // initializer; print size and contents
   Array integers3( integers1 );  // calls copy constructor

   cout << "\nSize of array integers3 is "
        << integers3.getSize()
        << "\nArray after initialization:\n" << integers3;

   // use overloaded assignment (=) operator
   cout << "\nAssigning integers2 to integers1:\n";
   integers1 = integers2;  // note target is smaller

   cout << "integers1:\n" << integers1
        << "integers2:\n" << integers2;

   // use overloaded equality (==) operator
   cout << "\nEvaluating: integers1 == integers2\n";

   if ( integers1 == integers2 )
      cout << "integers1 and integers2 are equal\n";

   // use overloaded subscript operator to create rvalue
   cout << "\nintegers1[5] is " << integers1[ 5 ];

   // use overloaded subscript operator to create lvalue
   cout << "\n\nAssigning 1000 to integers1[5]\n";
   integers1[ 5 ] = 1000;
   cout << "integers1:\n" << integers1;

   // attempt to use out-of-range subscript
   cout << "\nAttempt to assign 1000 to integers1[15]" << endl;
   integers1[ 15 ] = 1000;  // ERROR: out of range

   return 0;

} // end main

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