parallelogram.cpp

初学者用的关于VC继承思想的小程序,非常使用于初学者哦

//*************       parallelogram.cpp      ************

#include <iostream>
using namespace std;

#include <math.h>

#include "parallelogram.h"


//构造函数
Parallelogram::Parallelogram(double Xsider1,double Xsider2,double Xangle1,string Xcolour) 
:sider1(Xsider1), sider2(Xsider2), angle1(Xangle1), colour(Xcolour)
{
	/*cout << "Parallelogram construtor: ";
	print();
	cout << endl;*/
}


//析构函数
Parallelogram::~Parallelogram()
{
}


//设置函数
void Parallelogram::set(double Xsider1,double Xsider2,double Xangle1,string Xcolour)
{
	sider1 = Xsider1;
	sider2 = Xsider2;
	angle1 = Xangle1;
	colour = Xcolour;
}



//getsider1函数
double Parallelogram::getsider1() const
{
	return sider1;
}



//getsider2函数
double Parallelogram::getsider2() const
{
	return sider2;
}



//getangle1函数
double Parallelogram::getangle1() const
{
	return angle1;
}



//getcolour函数
string Parallelogram::getcolour() const
{
	return colour;
}



//print函数
void Parallelogram::print() const
{
	/*cout <<  "sider1 = " << getsider1() << ",sider2 = " << getsider2()
	     << ",angle1 = " << getangle1() << ",angle2 = " << (180-getangle1())
         << ",colour is " << getcolour().c_str()<< endl; */
	cout <<  "sider1 = " << sider1 << ",sider2 = " << sider2
	     << ",angle1 = " << angle1 << ",angle2 = " << (180-angle1)
         << ",colour is " << colour.c_str()<< endl; 
	//注意此行中getcolour().c_str()的.c_str()！！
}



//周长girth函数
double Parallelogram::girth() const
{
	//return (  getsider1() * 2+ getsider2() * 2 );
	return (  sider1 * 2+ sider2 * 2 );
}



//面积area函数
double Parallelogram::area() const
{
	//return ( getsider1() * getsider2() * sin (getangle1() * 3.1415926 / 180) );
	return ( sider1 * sider2 * sin (angle1 * 3.1415926 / 180) );
}