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Menu:
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1. Sum 2 complex numbers
2. Subtract 2 complex numbers
3. Multiply 2 complex numbers
4. Exit
Select your choice: 1
        Real part of number: 2
        Imaginary part of number: 5
        Real part of number: 3
        Imaginary part of number: 1
                Complex number = 5 + 6i

Select your choice: 2
        Real part of number: 4
        Imaginary part of number: 9
        Real part of number: 2
        Imaginary part of number: 7
                Complex number = 2 + 2i

Select your choice: 3
        Real part of number: 6
        Imaginary part of number: 2
        Real part of number: 2
        Imaginary part of number: 4
                Complex number = 4 + 28i