復(fù)數(shù)類Complex并重載運(yùn)算符.doc

1、 一、實(shí)驗(yàn)?zāi)康模?1) 理解編譯時的多態(tài)性和運(yùn)行時的多態(tài)性。 2) 掌握運(yùn)算符重載的基本方法。 3) 掌握虛函數(shù)的定義與使用方法。二、實(shí)驗(yàn)內(nèi)容及方法：1）定義一個復(fù)數(shù)類Complex，并重載運(yùn)算符+、-、*、/和負(fù)號（用友元函數(shù)實(shí)現(xiàn)）2) 定義一個有理數(shù)類，并重載運(yùn)算符+、-、*、/（用成員函數(shù)實(shí)現(xiàn)）。 class Rational public: /構(gòu)造函數(shù) Rational(int num1=0，int den1=1); /重載運(yùn)算符 const operator+(const Rational r)； const operator-( const Rational r)； const o

2、perator*( const Rational r)； const operator/( const Rational r)； private： /定義一個有理數(shù)num為分子，den為分母 int num, den； ； 3) 定義一個類Animal，該類中可以存放動物的名字，并有一個Identify函數(shù)用于顯示動物的種類。 4) 定義兩個類Cat、Dog，都繼承自Animal，并重載Identify函數(shù)，不但要顯示動物的種類，還要顯示動物的名字。 5) 定義一個Tiger類，繼承自Cat，重載Identify函數(shù)，顯示動物的種類和名字。三、實(shí)驗(yàn)程序如下：1、#includeclass co

3、mplexpublic:complex() real=imag=0;complex(double r) real=r;imag=0.0;complex(double r,double i)real=r;imag=i;friend complex operator+(complex,complex); friend complex operator-(complex,complex);friend complex operator*(complex,complex);friend complex operator/(complex,complex);friend complex operator

4、-(complex &); void Display();private:double real,imag;complex operator+(complex c1,complex c2)complex t;t.real=c1.real+c2.real;t.imag=c1.imag+c2.imag;return t;complex operator-(complex c1,complex c2)complex t;t.real=c1.real-c2.real;t.imag=c1.imag-c2.imag;return t; complex operator*(complex c1,comple

5、x c2)complex t;t.real=c1.real*c2.real-c1.imag*c2.imag;t.imag=c1.real*c2.imag+c1.imag*c2.real;return t; complex operator/(complex c1,complex c2)complex t; t.real=(c1.real*c2.real+c1.imag*c2.imag)/(c1.real*c1.real+c1.imag*c2.imag);t.imag=(c2.real*c1.imag-c1.real*c2.imag)/(c1.real*c1.real+c1.imag*c2.im

6、ag);return t;complex operator-(complex &c)complex t;t.real=-c.real;t.imag=-c.imag;return t;void complex:Display()cout0)cout+;if(imag!=0)coutiendl;void main()complex c1(5.0,2.4),c2(3.0,-2.5),c3;c3=c1+c2;coutc3=;c3.Display();c3=c1-c2;coutc3=;c3.Display();c3=c1*c2;coutc3=;c3.Display();c3=c1/c2;coutc3=;

7、c3.Display();c3=-c1;coutc3=;c3.Display();2、#include #include class Rationalpublic: /構(gòu)造函數(shù) Rational(int num1=0,int den1=1); /重載運(yùn)算符 const Rational operator+(const Rational &r); const Rational operator-( const Rational &r); const Rational operator*( const Rational &r); const Rational operator/( const Ra

8、tional &r); /重載輸出符 friend ostream& operator den * r.den; temp.num = this-num * r.den + this-den * r.num; temp.Reduction(); return temp;const Rational Rational:operator-(const Rational& r) Rational temp; temp.den = this-den * r.den; temp.num = this-num * r.den - this-den * r.num; temp.Reduction(); re

9、turn temp;const Rational Rational:operator*(const Rational& r) Rational temp; temp.den = this-den * r.den; temp.num = this-num * r.num; temp.Reduction(); return temp;const Rational Rational:operator/(const Rational& r) Rational temp; temp.den = this-den * r.num; temp.num = this-num * r.den; temp.Reduction(); return temp;void Rational:Reduction() int i,z; if (den=0) coutdata errornum?den:num; for(i=2;i=sqrt(z);i+) while(den%i=0 & num%i=0)/here den=den/i; num=num/i; ostream& operator(ostream& outs, const Rational& r) outsr.num/r.den