C++ program to perform arithmetic operations using objects and classes

class Complex
{
double real;
double img;
public:
Complex();
friend istream & operator >> (istream &, Complex &);
friend ostream & operator << (ostream &, const Complex &);
Complex operator + (Complex);
Complex operator * (Complex);
};
Complex::Complex()
{
real = 0;
img = 0;
}
istream & operator >> (istream &, Complex & i)
{
cin >> i.real >> i.img;
return cin;
}
ostream & operator << (ostream &, const Complex & d)
{
cout << d.real << " + " << d.img << "i" << endl;
return cout;
}
Complex Complex::operator + (Complex c1)
{
Complex temp;
temp.real = real + c1.real;
temp.img = img + c1.img;
return temp;
}
Complex Complex::operator * (Complex c2)
{
Complex tmp;
tmp.real = real * c2.real - img * c2.img;
tmp.img = real * c2.img + img * c2.real;
return tmp;
}
int main()
{
Complex C1, C2, C3, C4;
int flag = 1;
char b;
while (flag == 1)
{
cout << "Enter Real and Imaginary part of the Complex Number 1 : \n";
cin >> C1; 2+4i;
cout << "Enter Real and Imaginary part of the Complex Number 2 : \n";
cin >> C2; 3+2i;
int f = 1;
while (f == 1)
{
cout << "Complex Number 1 : " << C1 << endl; 2+4i;
cout << "Complex Number 2 : " << C2 << endl; 3+2i;
cout << "**********MENU**********" << endl;
cout << "1. Addition of Complex Numbers" << endl;
cout << "2. Multiplication of Complex Numbers" << endl;
cout << "3. Exit\n";
int a;
cout << "Enter your choice from above MENU (1 to 3) : ";
cin >> a;
if (a == 1)
{
C3 = C1+C2;
cout << "Addition : " << C3 << endl;
cout << "Do you want to perform another operation (y/n) : \n";
cin >> b;
if (b == 'y' || b == 'Y')
{
f=1;
}
else
{
cout << "Thanks for using this program!!\n";
flag=0;
f=0;
}
}
else if (a == 2)
{
C4 = C1 * C2;
cout << "Multiplication : " << C4 << endl;
cout << "Do you want to perform another operation (y/n) : \n";
cin >> b;
if (b == 'y' || b == 'Y')
{
f=1;
}
else
{
cout << "Thanks for using this program!!\n";
flag=0;
f=0;
}
}
else
{
cout << "Thanks for using this program!!\n";
flag=0;
f=0;
}
}
}
return 0;
}
Arithmetic operations on complex numbers using operator overloading using C++ language.
Program: # include using namespace std; class Complex { double real; double img; public: Complex(); friend istream & operator >> (istream &, Complex &); friend ostream & operator << (ostream &, const Complex &); Complex operator + (Complex); Complex operator * (Complex); }; Complex::Complex() { real = 0; img = 0; } istream & operator >> (istream &, Complex & i) { cin >> i.real >> i.img; return cin; } ostream & operator << (ostream &, const Complex & d) { cout << d.real << " + " << d.img << "i" << endl; return cout; } Complex Complex::operator + (Complex c1) { Complex temp; temp.real = real + c1.real; temp.img = img + c1.img; return temp; } Complex Complex::operator * (Complex c2) { Complex tmp; tmp.real = real * c2.real - img * c2.img; tmp.img = real * c2.img + img * c2.real; return tmp; } int main() { Complex C1, C2, C3, C4; int flag = 1; char b; while (flag == 1) { cout << "Enter Real and Imaginary part of the Complex Number 1 : \n"; cin >> C1; 2+4i; cout << "Enter Real and Imaginary part of the Complex Number 2 : \n"; cin >> C2; 3+2i; int f = 1; while (f == 1) { cout << "Complex Number 1 : " << C1 << endl; 2+4i; cout << "Complex Number 2 : " << C2 << endl; 3+2i; cout << "**********MENU**********" << endl; cout << "1. Addition of Complex Numbers" << endl; cout << "2. Multiplication of Complex Numbers" << endl; cout << "3. Exit\n"; int a; cout << "Enter your choice from above MENU (1 to 3) : "; cin >> a; if (a == 1) { C3 = C1+C2; cout << "Addition : " << C3 << endl; cout << "Do you want to perform another operation (y/n) : \n"; cin >> b; if (b == 'y' || b == 'Y') { f=1; } else { cout << "Thanks for using this program!!\n"; flag=0; f=0; } } else if (a == 2) { C4 = C1 * C2; cout << "Multiplication : " << C4 << endl; cout << "Do you want to perform another operation (y/n) : \n"; cin >> b; if (b == 'y' || b == 'Y') { f=1; } else { cout << "Thanks for using this program!!\n"; flag=0; f=0; } } else { cout << "Thanks for using this program!!\n"; flag=0; f=0; } } } return 0; } Output: Enter Real and Imaginary part of the Complex Number 1 : 4 6 Enter Real and Imaginary part of the Complex Number 2 : 2 3 Complex Number 1 : 4 + 6i Complex Number 2 : 2 + 3i **********MENU********** 1. Addition of Complex Numbers 2. Multiplication of Complex Numbers 3. Exit Enter your choice from above MENU (1 to 3) : 1 Addition : 6 + 9i Do you want to perform another operation (y/n) : y Complex Number 1 : 4 + 6i Complex Number 2 : 2 + 3i **********MENU********** 1. Addition of Complex Numbers 2. Multiplication of Complex Numbers 3. Exit Enter your choice from above MENU (1 to 3) : 2 Multiplication : -10 + 24i Do you want to perform another operation (y/n) : n Thanks for using this program!!
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