circletest3.cpp

《c＋＋大学教程》源码

// Fig. 9.16: circletest3.cpp
// Testing class Circle3.
#include <iostream>  

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

#include <iomanip>

using std::setprecision;

#include "circle3.h"  // Circle3 class definition

int main()
{
   Circle3 circle( 37, 43, 2.5 ); // instantiate Circle3 object

   // display point coordinates
   cout << "X coordinate is " << circle.getX() 
        << "\nY coordinate is " << circle.getY()
        << "\nRadius is " << circle.getRadius();

   circle.setX( 2 );          // set new x-coordinate
   circle.setY( 2 );          // set new y-coordinate
   circle.setRadius( 4.25 );  // set new radius

   // display new point value
   cout << "\n\nThe new location and radius of circle are\n";
   circle.print();

   // display floating-point values with 2 digits of precision
   cout << fixed << setprecision( 2 );

   // display Circle3's diameter
   cout << "\nDiameter is " << circle.getDiameter();

   // display Circle3's circumference
   cout << "\nCircumference is " << circle.getCircumference();

   // display Circle3's area
   cout << "\nArea is " << circle.getArea();

   cout << endl;

   return 0;  // indicates successful termination
   
} // end main

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