For objects of class Rational, overload the unary operator " - ", and the declaration of the operator function is_______ A: void Rational::operator-(); B: friend Rational operator-( ); C: Rational Rational::operator-() D: friend void operator-( Rational a );

Operator: ( ) A: An operator is a DNA region that is working with promoter for genes to express. B: An operator is a DNA region at 5’ of a gene for a repressor to bind to prevent gene expression. C: An operator is a repressor protein to help genes to express. D: An operator is a repressor protein to inhibit genes to express.

1、In MATLAB, the right division operator (/) and the left division operator (\) are equivalent.

The conditional operator (?:) ________. A: is the only ternary operator in C B: is a unary operator C: associates from left to right D: accepts two operands

The OR (||) operator _________.

Who is the operator?

The conditional operator (?:) ________.

1、In MATLAB, the right division operator (/) and the left division operator () are equivalent. A: 正确 B: 错误

下列是重载乘法运算符的函数原型声明,其中错误的是()。 A: MyClass operator*(double, double) ; B: MyClass operator*(double, MyClass); C: MyClass operator*(MyClass,double); D: MyClass operator*(MyClass, MyClass);

下列是重载乘法运算符的函数原型声明，其中错误的是( )。 A: MyClass operator * (double,double); B: MyClass operator * (double,MyClass); C: MyClass operator * (MyClass,double); D: MyClass operator * (MyClass,MyClass);