Overload the one-seat operator in C ++

The unary operator in C ++ operates on a single operand and here are some examples of single-operator operators:

Overloading the increment operator (++) and decreasing operator (-) in C ++.

Operator unary (-) in C ++

Negative logical operator (!) In C ++

The unary operator operates on the object to which they are called, and usually this operator appears to the left of the object, such as :! Obj, -obj, and ++ obj , but sometimes they can be used as is suffix like obj ++ or obj-- .

The following example explains how the (-) operator can be overloaded with the use of the prefix as well as the suffix.

 #include using namespace  std ; class KhoangCach { private : int  met ; int  centimet ; public : // khai bao cac constructor KhoangCach (){  met  = 0 ;  centimet  = 0 ; } KhoangCach ( int  m , int  c ){  met  =  m ;  centimet  =  c ; } // phuong thuc de hien thi khoang cach void  hienthiKC () {  cout  << "Khoang cach bang m la: " <<  met  <<  endl ;  cout  << "Khoang cach bang cm la: " <<  centimet  <<  endl ;  cout  << "nn================================nn" <<  endl ; } // nap chong toan tu (-) KhoangCach operator - () {  met  = - met ;  centimet  = - centimet ; return KhoangCach ( met ,  centimet ); } }; int  main () { KhoangCach  K1 ( 20 , 6 ),  K2 (- 6 , 15 ); - K1 ; // ap dung su phu dinh  K1 . hienthiKC (); // hien thi K1 - K2 ; // ap dung su phu dinh  K2 . hienthiKC (); // hien thi K2 return 0 ; } 

Compiling and running the above C ++ program will produce the following results:

Hopefully the above example will help you understand this concept and you can apply for operator operator (!) In C ++.

According to Tutorialspoint

Previous post: Load operator and Load overlap in C ++

Next lesson: Overload binary operator in C ++