More User-Defined Conversions

float p_real, p_imaginary;

public:

complex() { p_real = 0.0; p_imaginary = 0.0; }

complex(float r) { p_real = r; p_imaginary = 0.0; }

complex(float r, float i) { p_real = r, p_imaginary = i; }

complex(circuit &c);

// we can overload the int() typecasting operator! cool!

operator int() { return round(p_real); };

};

circuit cir; // recall that the voltage of a circuit is

// represented as a complex number

complex c5 = cir; // this is a user-defined type conversion:

// using complex::complex(circuit &c);

int i = c5; // now cal complex::operator int() to convert

// back to an integer;

int j = cir; // doesn’t work, the compiler won’t automatically

// find a series of conversions for you

int k = complex(cir); // this works, circuit->complex->int