Demonstrate the implicit conversion of one type to another - C++ Class

C++ examples for Class:Constructor

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Description

Demonstrate the implicit conversion of one type to another

Demo Code

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

class Complex//w ww .  j  ava  2s  .  c o m
{
  public:
    Complex() : dReal(0.0), dImag(0.0)
    { 
        cout << "invoke default constructor" << endl;
    }
    explicit Complex(double _dReal): dReal(_dReal), dImag(0.0){ 
        cout << "invoke real constructor " << dReal <<endl;
    }
    Complex(double _dReal, double _dImag): dReal(_dReal), dImag(_dImag){
        cout << "invoke complex constructor " << dReal << ", " << dImag << endl;
    }

    double dReal;
    double dImag;
};

int main(int argcs, char* pArgs[])
{
    Complex c1, c2(1.0), c3(1.0, 1.0);

    // constructor can be used to convert from one type to another
    c1 = Complex(10.0);

    c1 = (Complex)20.0;
    c1 = static_cast<Complex>(30.0);

    return 0;
}

Result


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