实验5 多态性和运算符重载

实验多态性和运算符重载姓

贡忠

班：电

学

序：49一实目通开环下生多性设与现了运行多的念掌派类多性本计编方。二实主内、、、

有角、正形圆三图求们自面。可抽出个类在类声一虚数用求积并用界设各图形面的方。使成函重实复四运、辑算关运；使友函重实字串接算赋运；三实程序1：std;#definePI3.14basepublic:virtual0;}}；basedoubleh;doublew;public:triangle(doubleH,doubleW)h=H;w=W;doublearea()0.5*h*w;base

doublea;public:A)doublearea()a*a;basedoublepublic:radius=Rad;doublearea()PI*radius*radius;base*a,*b,*c;a=newtriangle(2,4);circle(2);cout<<a->areacout<<b->area()<<endl;cout<<c->area()<<endl;程2std;//复doublereal;//实部doubleimag;//虚部

public:complex(){};Imag)complex(complex&);//用成员函重载实复数加法运complex(complex&);//使用员函数载实现复数法运算complex//使用成员函数载实现数乘法运算complex(complex&);//使用成员函数重载现复数法运complexoperator&&(complex&);//使用成员函数重载实现与运算complexoperator||(complex&);//使用成员函数重实现或算complex();//用成员函数载实非运算complex//用成员数重载实现运算print(complex&//输出果cout<<c.real<<c.imag<<'i'<<"\n";cout<<c.real<<'+'<<c.imag<<'i'<<"\n";complexoperator+(complex&//法complex(real+c.real,imag+c.imag);complexoperator-(complex&c)//减法complexoperator*(complex&c)//法complex(real*-imag*real*c.imag+*complex(complex//法complex((real*c.real++/*c.real**c.real-real*/**complex(complex&//与运算complex(real&&c.real,imag&&c.imag);complex(complex&//运算

complexoperator!//运算complexoperator<(complex&小于运算if(real<c.real)returncomplex-0.0),c2(4.0,-2.0),c3=+c2;cout<<"c1+c2=";c3.print(c3);c3=-c2;c3.print(c3);c3=*c2;cout<<"c1*c2=";c3.print(c3);c3=/c2;c3.print(c3);c3=c1&&c2;c3.print(c3);c3=c1||c2;cout<<"c1||c2=";c3.print(c3);c3=!c1;c3.print(c3);c3=c1<c2;cout<<"输出部较小复数=";程序：#include<string.h>std;StringcharStr[100];public:String(char*friendString(constString&,constString&);print()String

c3.print(c3);

char*str;Stringoperator+(constString&String&b)strcat(str,b.Str);String(str);Stringa1("VisualC++"),a2("6.0"),a3,a4;a1.print();();+a3.