下列是重载为非成员函数的运算符函数原型,其中错误的是(  )。

A:Fractionoperator+(Fraction,Fraction); B:Fractionoperator-(Fraction); C:Fraction&operator=(Fraction&,Fraction); D:Fraction&operator+=(Fraction&,Fraction):

下面是重载为非成员函数的运算符函数原型,其中错误的是( )。

A:Fraction operator+(Fraction, Fraction); B:Fraction operator-(Fraction); C:Fraction& operator=(Fraction&, Fraction); D:Fraction& operator+=(Fraction&, Fraction);

下列是重载为非成员函数的运算符函数原型,其中错误的是( )。

A:Fraction operator+(Fraction,Fraction); B:Fraction operator-(Fraction); C:Fraction&operator=(Fraction&,Fraction); D:Fraction&operator+=(Fraction&,Fraction);

下面是重载为非成员函数的运算符函数原型,其中错误的是( )。

A:Fraction operator+ (Fraction,Fraction); B:Fraction opemtor-(Fraction); C:Fraction& operator=(Fraction&,Fraction); D:Fraction& operator+=(Fraction&,Fraction);

下列是重载为非成员函数的运算符函数原型,其中错误的是( )。

A:Fraction operator+(Fraction,Fraction); B:Fraction operator-(Praction); C:Fraction& operator=(Fraction&,Fraction); D:Fraction& operator+=(Fraction&,Fraction);

下面是重载为非成员函数的运算符函数原型,其中错误的是

A:Fraction operator+(Fraction,Fraction); B:Fraction operator-(Fraction); C:Fraction&operator=(Fraction&,Fraction); D:Fraction&operator+=(Fraction&,Fraction);

下列是重载为非成员函数的运算符函数原型,其中错误的是( )。

A:Fraction operator+(Fraction,Fraction); B:Fraction operator-(Fraction); C:Fraction&operator=(Fraction&,Fraction); D:Fraction&operator+=(Fraction&,Fraction);

下面是重载为非成员函数的运算符函数原型,其中错误的是

A:Fraction operator+(Fraction,Fraction); B:Fraction operator-(Fraction); C:Fraction&operator=(Fraction&,Fraction); D:Fraction&operator+=(Fraction&,Fraction);

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