This program takes two complex numbers (entered by user) as input and displays the sum of them.

## Example: Program to add two complex numbers entered by user

#include <iostream> using namespace std; class complex_number { public : int real, imag; }; int main() { complex_number num1, num2, sum; //getting the value of first complex number from user cout << "Enter real and imaginary parts of first complex number:"<<endl; cin >> num1.real >> num1.imag; //getting the value of second complex number from user cout << "Enter real and imaginary parts of second complex number:"<<endl; cin >> num2.real >> num2.imag; //addition of real and imaginary parts of complex numbers entered by user sum.real = num1.real + num2.real; sum.imag = num1.imag + num2.imag; //displaying the sum of complex numbers if ( sum.imag >= 0 ) cout << "Sum of two complex numbers = " << sum.real << " + " << sum.imag << "i"; else cout << "Sum of two complex numbers = " << sum.real << " - " << sum.imag << "i"; return 0; }

**Output:**

Enter real and imaginary parts of first complex number: 4 6 Enter real and imaginary parts of second complex number: 2 3 Sum of two complex numbers = 6 + 9i

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