问题及代码
阅读教材例10.1。该例实现了一个复数类,但是美中不足的是,复数类的实部和虚部都固定只能是double型的。可以通过模板类的技术手段,设计Complex,使实部和虚部的类型为定义对象时指定的实际类型。
(1)要求类成员函数在类外定义。
(2)在此基础上,再实现减法、乘法和除法
/* * Copyright (c) 2015, 烟台大学计算机学院 * All rights reserved. * 文件名称:test.cpp * 作 者:辛彬 * 完成日期:2015 年 4 月 12 日 * 版 本 号:v1.0 */ #include<iostream> using namespace std; template<class numtype> class Complex { public: Complex(){} Complex(numtype xx,numtype yy):x(xx),y(yy){} Complex complex_add(Complex &a); Complex complex_subtract(Complex &a); Complex complex_multiply(Complex &a); Complex complex_divid(Complex &a); Complex display(); private: numtype x; numtype y; }; template<class numtype> Complex<numtype> Complex<numtype>::complex_add(Complex<numtype> &a) { Complex t; t.x=x+a.x; t.y=y+a.y; return t; } template<class numtype> Complex<numtype> Complex<numtype>::complex_subtract(Complex<numtype> &a) { Complex t; t.x=x-a.x; t.y=y-a.y; return t; } template<class numtype> Complex<numtype> Complex<numtype>::complex_multiply(Complex<numtype> &a) { Complex t; t.x=x*a.x; t.y=y*a.y; return t; } template<class numtype> Complex<numtype> Complex<numtype>::complex_divid(Complex<numtype> &a) { Complex t; t.x=x/a.x; t.y=y/a.y; return t; } template<class numtype> Complex<numtype> Complex<numtype>::display() { cout<<"("<<x<<","<<y<<")"<<endl; } int main( ) { Complex<int> c1(3,4),c2(5,-10),c3; //实部和虚部是int型 c3=c1.complex_add(c2); cout<<"c1+c2="; c3.display( ); Complex<double> c4(3.1,4.4),c5(5.34,-10.21),c6; //实部和虚部是double型 c6=c4.complex_add(c5); cout<<"c4+c5="; c6.display( ); //下面测试减法、乘法和除法 c3=c1.complex_subtract(c2); cout<<"c1-c2="; c3.display( ); c3=c1.complex_multiply(c2); cout<<"c1*c2="; c3.display( ); c3=c1.complex_divid(c2); cout<<"c1/c2="; c3.display( ); return 0; }
原文地址:http://blog.csdn.net/blue_skyrim/article/details/45013063