complex.h

一个简单有效的CMM语言的词法分析器,带图形界面

using namespace std;

class Complex
{
  public:
    Complex();
    Complex(double);
    Complex(double,double);

    string  write() const;
   Complex operator+(const Complex&) const;
   Complex operator-(const Complex&) const;
   Complex operator*(const Complex&) const;
   Complex operator/(const Complex&) const;
 private:
   double real;
   double imag;
};
Complex::Complex()
{
  real=imag=0.0;
}
Complex::Complex(double re)
{
  real=re;
  imag=0.0;
}
Complex::Complex(double re,double im)
{
  real=re;
  imag=im;
}
string  Complex::write() const
{
  string temComplex=real+"+"+imag+"i";
  return temComplex;
}
Complex Complex::operator+(const Complex& c1) const
{
   Complex v(real+c1.real,imag+c1.imag);
   return v;
}
Complex Complex::operator-(const Complex& c1) const
{
   Complex v(real-c1.real,imag-c1.imag);
   return v;
}
Complex Complex::operator*(const Complex& c1) const
{
   Complex v(real*c1.real-imag*c1.imag,real*c1.imag+imag*c1.real);
   return v;
}
Complex Complex::operator/(const Complex& c1) const
{
   double squr=c1.real*c1.real+c1.imag*c1.imag;
   Complex v(
            (real*c1.real+imag*c1.imag)/squr,
            (imag*c1.real-real*c1.imag)/squr);  
   return v;
}