C++ type change constructor

typeChangeConstructor.cpp

#include <iostream>

using namespace std;

class Complex {
public:
  double real, imag;
  Complex( int i ) { //类型转换构造函数
  cout << "IntConstructor called" << endl;
  real = i; imag = 0;
  }
  Complex( double r, double i )
  { real = r; imag = i; }
};

int main () {
  Complex c1(7, 8);
  Complex c2 = 12;
  c1 = 9; // 9被自动转换成一个临时Complex对象
  cout << c1.real << "," << c1.imag << endl;
  return 0;
}