fig17_05.cpp

来自「《c＋＋大学教程》源码」· C++ 代码 · 共 105 行

// Fig. 17.5: fig17_05.cpp
// List class test program.
#include <iostream>

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

#include <string>

using std::string;

#include "list.h"  // List class definition

// function to test a List
template< class T >
void testList( List< T > &listObject, const string &typeName )
{
   cout << "Testing a List of " << typeName << " values\n";

   instructions();  // display instructions

   int choice;
   T value;

   do {
      cout << "? ";
      cin >> choice;

      switch ( choice ) {
         case 1:
            cout << "Enter " << typeName << ": ";
            cin >> value;
            listObject.insertAtFront( value );
            listObject.print();
            break;

         case 2:
            cout << "Enter " << typeName << ": ";
            cin >> value;
            listObject.insertAtBack( value );
            listObject.print();
            break;

         case 3:
            if ( listObject.removeFromFront( value ) )
               cout << value << " removed from list\n";

            listObject.print();
            break;

         case 4:
            if ( listObject.removeFromBack( value ) )
               cout << value << " removed from list\n";

            listObject.print();
            break;

      } // end switch

   } while ( choice != 5 );  // end do/while

   cout << "End list test\n\n";

} // end function testList

// display program instructions to user
void instructions()
{
   cout << "Enter one of the following:\n"
        << "  1 to insert at beginning of list\n" 
        << "  2 to insert at end of list\n" 
        << "  3 to delete from beginning of list\n" 
        << "  4 to delete from end of list\n" 
        << "  5 to end list processing\n";

} // end function instructions

int main()
{
   // test List of int values
   List< int > integerList;
   testList( integerList, "integer" ); 

   // test List of double values
   List< double > doubleList;
   testList( doubleList, "double" ); 

   return 0;

} // end main

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