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Finish a class called Complex for complex numbers. Write the full runnable program with this class. Following requirements should be satisfied:

(a) Use double variables for the private data.
(b) Provide a constructor with default values.
(c) Provide functions support arithmetic calculation of adding and subtracting with Complex number objects.
(d) Provide function printing Complex numbers in the form “a + bi”.

```class Complex
{
private:
double r;
double i;
public:
Complex(double, double);       // Constructor with two arguments
Complex(double );              // Constructor with one argument
Complex();                     // default constructor

Complex operator- (Complex&);

void    print();               // prints the complex number
};```

main() function:

```int main()
{
double ar,ai,br,bi,cr;
cin>>ar>>ai>>br>>bi>>cr;
Complex a(ar,ai);
cout << "Constructor with two values: a = ";
a.print();

Complex b(br,bi);
cout << "b = ";
b.print();

Complex c(cr);
cout << "Constructor with one value: c = ";
c.print();

c = a + b;
cout << "a + b = ";
c.print();

Complex d;
cout << "Default constructor: d = ";
d.print();

d = a - b;
cout << "a - b = ";
d.print();

return 0;
}```

Example input:

`1 2 3 4 5`

Example output:

```Constructor with two values: a = 1 + 2i
b = 3 + 4i
Constructor with one value: c = 5 + 0i
a + b = 4 + 6i
Default constructor: d = 0 + 0i
a - b = -2 - 2i```