Complex number(for lab)

标签（空格分隔）： 程序设计实验 c++

本人学院

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Description:

Create a class called Complex for performing arithmetic with complex numbers.
Complex numbers have the form
realPart + imaginaryPart * i
where i is √-1
Use double variables to represent the private data of the class. Provide a constructor that enables an object of
this class to be initialized when it is declared. The constructor should contain default values in case no initializers
are provided. Provide public member functions that perform the following tasks:
a) Adding two Complex numbers: The real parts are added together and the imaginary parts are added together.

b) Subtracting two Complex numbers: The real part of the right operand is subtracted from the real part of    the left operand and the imaginary part of the right operand is subtracted from the imaginary part of the left operand.c) Printing Complex numbers in the form (a, b) where a is the real part and b is the imaginary part.

Part of the header files given:

// Lab 1: Complex.h#ifndef COMPLEX_H#define COMPLEX_H/* Write class definition for Complex */class Complex {public: /* Write the public variables or functions of the class */private: /* Write the private variables or functions of the class */};#endif

// Lab 1: Complex.cpp// Member-function definitions for class Complex.#include <iostream>using namespace std;#include "Complex.h"Complex::Complex( double real, double imaginary ) { setComplexNumber( real, imaginary ); } // end Complex constructorComplex Complex::add( const Complex &right ) { /* Write a statement to return a Complex object. Add  the realPart of right to the realPart of this Complex  object and add the imaginaryPart of right to the  imaginaryPart of this Complex object */} // end function addComplex Complex::subtract( const Complex &right ) { /* Write a statement to return a Complex object. Subtract  the realPart of right from the realPart of this Complex  object and subtract the imaginaryPart of right from  the imaginaryPart of this Complex object */} // end function subtractvoid Complex::printComplex() { cout << '(' << realPart << ", " << imaginaryPart << ')';} // end function printComplexvoid Complex::setComplexNumber( double rp, double ip ) { realPart = rp; imaginaryPart = ip;} // end function setComplexNumber

Hint:
You may write a main function to test your class before you submit your code.

提示：请自学引用先关知识点。
main.cpp

// Lab 1: ComplexTest.cpp#include <iostream>using std::cin;using std::cout;using std::endl;#include "Complex.h"int main() {    int n[8];    cin >> n[0] >> n[1] >> n[2] >> n[3];    cin >> n[4] >> n[5] >> n[6] >> n[7];    Complex a(n[0], n[1]), b(n[2], n[3]), c;    // create three Complex objects    a.printComplex();  // output object a    cout << " + ";    b.printComplex();  // output object b    cout << " = ";    c = a.add(b);    // invoke add function and assign to object c    c.printComplex();  // output object c    cout << '\n';    a.setComplexNumber(n[4], n[5]);  // reset realPart and    b.setComplexNumber(n[6], n[7]);  // and imaginaryPart    a.printComplex();  // output object a    cout << " - ";    b.printComplex();  // output object b    cout << " = ";    c = a.subtract(b);  // invoke add function and assign to object c    c.printComplex();  // output object c    cout << endl;}  // end main

读题

my answer

Complex.h

// Lab 1: Complex.h#ifndef COMPLEX_H#define COMPLEX_H/* Write class definition for Complex */class Complex {    public:        Complex(double real, double imaginary);        Complex();        Complex add(const Complex &right);        Complex subtract(const Complex &right);        void printComplex();        void setComplexNumber(double rp, double ip);    private:        double realPart;  // realPart        double imaginaryPart;  // imaginaryPart};#endif

Complex.cpp

// Lab 1: Complex.cpp// Member-function definitions for class Complex.#include <iostream>using namespace std;#include "Complex.h"Complex::Complex(double real, double imaginary) {    setComplexNumber(real, imaginary);}  // end Complex constructorComplex::Complex() {    setComplexNumber(0, 0);}  // end Complex constructorComplex Complex::add(const Complex &right) {    return Complex(realPart + right.realPart,                   imaginaryPart + right.imaginaryPart);}  // end function addComplex Complex::subtract(const Complex &right) {    return Complex(realPart - right.realPart,                   imaginaryPart - right.imaginaryPart);}  // end function subtractvoid Complex::printComplex() {    cout << '(' << realPart << ", " << imaginaryPart << ')';}  // end function printComplexvoid Complex::setComplexNumber(double rp, double ip) {    realPart = rp;    imaginaryPart = ip;}  // end function setComplexNumber

the standard answer

Complex.h

// Lab 1: Complex.h#ifndef COMPLEX_H#define COMPLEX_H/* Write class definition for Complex */class Complex {    public:        Complex(double = 0.0, double = 0.0);  // default constructor        Complex add(const Complex &);  // function add        Complex subtract(const Complex &);  // function subtract        void printComplex();  // print complex number format        void setComplexNumber(double, double);  // set complex number    private:        double realPart;        double imaginaryPart;};#endif

Complex.cpp

// Lab 1: Complex.cpp// Member-function definitions for class Complex.#include <iostream>#include "Complex.h"using std::cout;Complex::Complex(double real, double imaginary) {    setComplexNumber(real, imaginary);}  // end Complex constructorComplex Complex::add(const Complex &right) {    return Complex(            realPart + right.realPart, imaginaryPart + right.imaginaryPart);}  // end function addComplex Complex::subtract(const Complex &right) {    return Complex(            realPart - right.realPart, imaginaryPart - right.imaginaryPart);}  // end function subtractvoid Complex::printComplex() {    cout << '(' << realPart << ", " << imaginaryPart << ')';}  // end function printComplexvoid Complex::setComplexNumber(double rp, double ip) {    realPart = rp;    imaginaryPart = ip;}  // end function setComplexNumber