fig06_22.cpp

c++大学教程第5版的配套书源代码

// Fig. 6.22: fig06_22.cpp
// Using default arguments.
#include <iostream>
using std::cout;
using std::endl;

// function prototype that specifies default arguments
int boxVolume( int length = 1, int width = 1, int height = 1 );

int main()
{
   // no arguments--use default values for all dimensions
   cout << "The default box volume is: " << boxVolume();
   
   // specify length; default width and height
   cout << "\n\nThe volume of a box with length 10,\n"
      << "width 1 and height 1 is: " << boxVolume( 10 );
        
   // specify length and width; default height
   cout << "\n\nThe volume of a box with length 10,\n" 
      << "width 5 and height 1 is: " << boxVolume( 10, 5 );
   
   // specify all arguments 
   cout << "\n\nThe volume of a box with length 10,\n"
      << "width 5 and height 2 is: " << boxVolume( 10, 5, 2 )
      << endl;
   return 0; // indicates successful termination
} // end main

// function boxVolume calculates the volume of a box
int boxVolume( int length, int width, int height )
{ 
   return length * width * height;
} // end function boxVolume


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