driver.cpp

《c＋＋大学教程实验指导书》源码

// Chapter 8 of C++ How to Program
// driver.cpp
#include <iostream> 

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

#include "rational.h"

int main()
{
   RationalNumber c( 7, 3 );  
   RationalNumber d( 3, 9 );
   RationalNumber x;

   c.printRational();
   cout << " + " ;
   d.printRational();
   cout << " = ";
   x = c + d;
   x.printRational();

   cout << '\n';
   c.printRational();
   cout << " - " ;
   d.printRational();
   cout << " = ";
   /* Write statement to subtract c from d and assign the result to x */
   x.printRational();

   cout << '\n';
   c.printRational();
   cout << " * " ;
   d.printRational();
   cout << " = ";
   /* Write statement to multiply c and d and assign the result to x */
   x.printRational();

   cout << '\n';
   c.printRational();
   cout << " / " ;
   d.printRational();
   cout << " = ";
   x = c / d;
   x.printRational();

   cout << '\n';
   c.printRational();
   cout << " is:\n";

   cout << ( ( c > d ) ? "  > " : "  <= " );
   d.printRational();
   cout << " according to the overloaded > operator\n";

   cout << ( ( c < d ) ? "  < " : "  >= " );
   d.printRational();
   cout << " according to the overloaded < operator\n";

   cout << ( ( c >= d ) ? "  >= " : "  < " );
   d.printRational();
   cout << " according to the overloaded >= operator\n";

   cout << ( ( c <= d ) ? "  <= " : "  > " );
   d.printRational();
   cout << " according to the overloaded <= operator\n";

   cout << ( ( c == d ) ? "  == " : "  != " );
   d.printRational();
   cout << " according to the overloaded == operator\n";

   cout << ( ( c != d ) ? "  != " : "  == " );
   /* Write statement to print d */
   cout << " according to the overloaded != operator" << endl;

   return 0;

} // end main


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