Informatics3-2024/Solutions6

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Solutions

Only the solutions we discussed on the practical will be here. All the other tasks are perfect to practice for the written exam.

Complex with operators

#include<iostream>
#include<cmath>
 
using namespace std;
 
 
class Complex {
private:
  float re;
  float im;
public:
  Complex();
  Complex(const Complex& other);
  Complex(float r);
  Complex(float r, float i);
  Complex operator+(Complex other);
  Complex operator*(Complex other);
  float abs();
 
  void print();
 
  friend ostream& operator<<(ostream& os, Complex& c);
 
  ~Complex();
};
 
Complex::Complex() {
  re = 0;
  im = 0;
}
 
Complex::Complex(const Complex& other) {
  re = other.re;
  im = other.im;
}
 
Complex::Complex(float r) {
  re = r;
  im = 0;
}
 
Complex::Complex(float r, float i) {
  re = r;
  im = i;
}
 
Complex Complex::operator+(Complex other) {
  return Complex(this->re + other.re, this->im + other.im);
}
 
Complex Complex::operator*(Complex other) {
  float real = this->re * other.re - this->im * other.im;
  float imag = this->re * other.im + this->im * other.re;
  return Complex(real, imag);
}
 
float Complex::abs() {
  return sqrt(this->re * this->re + this->im * this->im);
}
 
ostream& operator<<(ostream& os, Complex& c) { 
  os << c.re << " + " << c.im << "i";
  return os;
}
 
Complex::~Complex() {
}
 
int main(void) {
  Complex a;
  Complex b = Complex(1,2);
  Complex c = a * b;
  Complex d = b + b + b;
  Complex e = b * d;
  //Complex e = b.operator*(d);
 
  // 5 / 6 / 7;
  // /(/(5, 6), 7);
 
  cout << "a: " << a << endl; 
 
 
  cout << "b: " << b << endl;
  cout << "c: " << c << endl;
  cout << "d: " << d << endl;
  cout << "e: " << e << endl;
 
  //cout << (c + d) << endl;
 
  cout << b.abs() << endl;
 
  return 0;
}