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return *this * rec_power(base, n-1);
comp t = *this * rec_power(base, n-1);
return t;
#include <iostream>
#include <fstream>
#include <cmath>
#include <iomanip>
using namespace std;
template <typename T>
class comp
{
public:
T im;
T re;
public:
// Constructor with parameters
comp(T re, T im)
{
this->im = im;
this->re = re;
}
// Default constructor
comp()
{
this->im = 0;
this->re = 0;
}
// Constructor with one param. Assuming that single parameter
// is the real part of the comple number
comp(T re)
{
this->re = re;
}
// Copy constructor
comp(const comp& c)
{
re = c.re;
im = c.im;
}
// Empty destructor
~comp() {};
comp& operator+(comp& second)
{
comp result;
result.re = this->re + second.re;
result.im = this->im + second.im;
return result;
}
// Multiplying a complex number by another complex number
comp& operator*(comp& second)
{
comp result;
result.re = this->re * second.re + (-1)* this->im * second.im;
result.im = this->re * second.im + this->im * second.re;
return result;
}
// Multiplying a complex number by another number number
comp& operator*(T n)
{
comp result;
result.re = this->re * n;
result.im = this->im * n;
return result;
}
T modulus()
{
return sqrt(this->re*this->re + this->im*this->im);
}
comp& it_power(int n)
{
comp result(1, 0);
for (int i = 1; i <= n; i++)
result = *this * result;
return result;
}
comp& rec_power(comp base, int n)
{
comp one(1, 0);
if (n == 0)
return one;
else if (n == 1)
return *this;
else
{
comp t = *this * rec_power(base, n-1);
return t;
// investigate why this does not work
//return *this * rec_power(base, n-1);
}
}
// Overloading input operator
friend std::ostream& operator<<(ostream& out, comp& c)
{
out << setprecision(2) << fixed
<< "(" << c.re << ", " << c.im
<< "i)" << endl;
return out;
}
// Overloading output operator
friend std::istream& operator>>(istream& in, comp& c)
{
in >> c.re ;
in >> c.im;
return in;
}
};
int main()
{
comp<double> myc(3, 2);
comp<double> myc2(1, 4);
// cin >> myc;
// cin >> myc2;
comp<double> r = myc + myc2;
comp<double> m = myc * myc;
cout << r;
cout << m;
cout << r.modulus() << endl;
cout << m.modulus() << endl;
cout << myc.it_power(6) << endl;
cout << myc.rec_power(myc, 6) << endl;
return 0;
}
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return *this * rec_power(base, n-1);
comp t = *this * rec_power(base, n-1);
return t;
comp& it_power(int n)
{
comp result(1, 0);
for (int i = 1; i <= n; i++)
result = *this * result;
return result;
}
This will update the object on which the function is being called (the "this" pointer).
no. comp rec_power(comp base, int n) const{
if (n == 0)
return comp(1,0);
comp t = (*this) * rec_power(base, n-1);
return t;
}
you see for n == 1 the return value would be (*this) * (1,0) what is the same as (*this).// investigate why this does not worki would guess it will be accepted by the compiler if you changed the return type to value type.
//return *this * rec_power(base, n-1);
return *this * rec_power(base, n-1);
comp t = *this * rec_power(base, n-1);
return t;
comp rec_power(comp base, int n)
{
if (n == 0)
return comp(1,0);
comp t = (*this) * rec_power(base, n-1);
return t;
// investigate why this does not work
//return *this * rec_power(base, n-1);
}
C:\Complex2\main.cpp|98|error: no match for 'operator*' in '*(comp<double>*)this * comp<T>::rec_power(comp<T> , int) [with T = double; comp<T> = comp<double>](comp<double> ((*(const comp<double>*)(& base))), (n + -1))'|
comp& operator*(comp& second)the problem is not the dereference operator* but the multiplication operator*. for that you defined an operator function which actually is an operator*= , as it changes the 'this'. because of that definition the compiler doesn't accept a multiplication of *this in another member function.
// addition (add another comp to *this and return a temporary by value)
comp operator+(const comp & t) const { .. }
// multiplication (multiply another comp to *this and return a temporary by value)
comp operator*(const comp & t) const
{
comp temp;
temp.re = this->re * second.re + (-1)* this->im * second.im;
temp.im = this->re * second.im + this->im * second.re;
// here do not change 'this' but return temp by value
return temp;
}
// the operator*= would be a non-const function:
// multiplication + assignment
comp & operator*=(const comp & second)
{
comp temp;
temp.re = this->re * second.re + (-1)* this->im * second.im;
temp.im = this->re * second.im + this->im * second.re;
// here the this was modified
*this = temp;
return *this; // return a reference to modified this
}
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