C++PrimerPlus第十一章类的使用，类自动类型转换和强制类型转换（重量单位：英石和磅的转换）0004

#pragma region 11.21.stone1.cpp
////程序清单
//xxx.cpp -- user-defined conversion functongs
#if 1
#include <iostream>
#include"stonewt1.h"

int main()
{
	using std::cout;
	Stonewt popins(9, 2.8);
	double p_wt = popins;
	cout << "Convert to double => ";
	cout << "Poppins: " << p_wt << " pounds.\n";
	cout << "Convert ot int => ";
	cout << "Popings: " << int(popins) << " pounds.\n";
	return 0;
}
#endif
#pragma endregion

下面是程序清单 11.19~程序清单11.21组成的程序的输出;它显示了将 Stonewt对象转换为 double 类型和 int 类型的结果:
一下课我们分析一下测试代码