下面重载乘法运算符的函数原型声明中正确的是: MyClass operator *(double ,MyClass); MyClass operator *(MyClass ,MyClass); MyClass operator *(double ,double); MyClass operator *(MyClass ,double);
MyClass operator *(double ,MyClass);
MyClass operator *(MyClass ,MyClass);
MyClass operator *(double ,double);
MyClass operator *(MyClass ,double);
