Answer to Question #101984 in C++ for Fardeen Shaikh

Question

Define a class named Complex for representing complex numbers. A complex number has the general form a + ib, where a- the real part, b - the imaginary part are both real numbers and i2=-1. Define parameterized and default constructor. Overload binary + and - operators with usual meaning.

Answer 1

#include <iostream>

#include <string>

#include <sstream>

class Complex

{

private:

double a,

b;

public:

Complex() { a = 0; b = 0; }

Complex(double a, double b) { this->a = a; this->b = b; }

Complex operator + (Complex const& obj) {

Complex res;

res.a = a + obj.a;

res.b = b + obj.b;

return res;

}

Complex operator - (Complex const& obj) {

Complex res;

res.a = a - obj.a;

res.b = b - obj.b;

return res;

}

std::string print()

{

std::string result = "";

std::ostringstream a_sstream;

a_sstream << a;

std::string a_str = a_sstream.str();

std::ostringstream b_sstream;

b_sstream << b;

std::string b_str = b_sstream.str();

if (b < 0)

result = a_str + b_str + "i";

else

result = a_str + "+" + b_str + "i";

return result;

}

};

//example of use

int main()

{

Complex num1(2.5, 4.1),

num2(-3.4, -2.8);

Complex num3 = num1 - num2;

std::cout << num3.print();

return 0;

}