C + + operator overloading

Keyword operator

Operator overloading essence is the invocation of a function

return type operator operator (argument list)

{code: ；}

Unary operator overloading

such as the minus

return type operator-()

{

Member variable =-member variable;

return *this;

}

The parameter list for pre-+ (or minus) and post-gaga (or minus) is required for a symbolic int parameter

Binary operator overloading

such as the Plus

return type operator+ (Type A, type B)//global function

{

Type C;

C. member variable =a. Member variable +b. member variable;

return C;

}

return type operator+ (const type &B)//member function

{

Type C;

C. member variable =this-> member variable +b. member variable;

return C;

}

C + + operator overloading