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CIS U001 Introduction to Programming: C++ Rohit Valsakumar [e-mail] SPRING 2003 Lab 11
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LAB 11
Overloading:
Write a program that contains and does the following: A) Create a class called "Complex" for performing arithmetic operations with complex numbers. B) Write a program to test your class. C) Complex numbers have the form realpart + imaginarypart * i where i represents the square root of -1. (E.g.: 5 + 6i) D) Use floating-point variables to represent the private data of the class. E) Provide a constructor function that enables an object of this class to be initialized when it is declared. F) The constructor should contain default values in case no initializes are provided. G) Provide public member functions for each of the following: 1) Addition of two Complex numbers: The real parts are added together and the imaginary parts are added together. [Eg. (3+2i)+(2+3i) = 5 + 5i] 2) Subtraction of 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. [E.g. (3+4i)-(2+2i) = 1 + 2i] 3) Printing Complex numbers in the form (a, b) where a is the real part and b is the imaginary part.
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#include<iostream.h> class Complex { public: Complex() {real = 0.0; imaginary = 0.0;}; // Default Constructor Complex (float, float); // Initialization Constructor Complex operator+ (const Complex &); //Addition Complex operator- (const Complex &); //Subtraction void display (const Complex &); //Display The Number void display (const Complex & , const Complex &, const Complex &); //Display Result ~Complex(){}; //Destructor private: float real; //real part float imaginary; //imaginary part }; // Initialization constructor Complex::Complex(float r, float i) :real(r), imaginary(i) { cout << "\nCalling Initialization Constructor\n"; } //Overloading Operator Complex Complex::operator+(const Complex &c) { Complex add; add.real = real + c.real; add.imaginary = imaginary + c.imaginary; return add; } Complex Complex::operator-(const Complex &d) { Complex sub; sub.real = real - d.real; sub.imaginary = imaginary - d.imaginary;
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return sub; } //Overloading Function void Complex (const ::display Complex & obj1) { if (obj1.imaginary >=0) cout << obj1. real << " + "<< obj1.imaginary<<"i"; else cout << obj1. real << " "<< obj1.imaginary<<"i"; } void Complex ::display (const Complex & obj1, const Complex & obj2, const Complex & obj3) { cout << "\n\nCalling the function to Display Results " ; cout << "\nThe two Complex numbers are " ; display (obj1) ; cout << " and "; display (obj2) ; cout << "\n"; cout << "The Result of the operation is :\n"; display(obj3); cout << "\n"; } int main() { Complex first(5.6, 3.7), second(4.5, 3.2), result; int i; first .display(first); cout << "\n"; second.display(second); cout << "\n"; result.display(result); result = first + second; result. display(first, second, result); result = first - second; result. display(first, second, result); cin >>i; }
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Friend Function Example :
In the example given below, the function convert is declared as a friend function in class Temperature thus the function can access the private data members of the class Temperature. Also note the call to the function in the main program. Is it different from the call to the class functions you have seen before? #incl...