Skip to main content

const used with functions

const used with functions :
class Dog {
   int age;
   string name;
public:
   Dog() { age = 3; name = "dummy"; }
   
   // const parameters and these are overloaded functions
   void setAge(const int& a) { age = a; }
   void setAge(int& a) { age = a; }
   
   // Const return value
   const string& getName() {return name;}
   
   // const function and these are overloaded functions
   void printDogName() const { cout << name << "const" << endl; }  // value of name can't be modified
   void printDogName() { cout << getName() << " non-const" << endl; }
};

 int main() {
   Dog d;
   d.printDogName();
   
   const Dog d2;
   d2.printDogName();
   
}
Labels:

Comments

Post a Comment

Popular posts from this blog

Structured Bindings

Returning multiple Values from function C++ 11 vs C++ 17 Returning compound objects Iterating over a compound collection Direct initialization Returning multiple Values from function C++ 11 vs C++ 17 :  C++ 11 (std::tie): std::tuple mytuple() {     char a = 'a';     int i = 123;     bool b = true;     return std::make_tuple(a, i, b);  // packing variable into tuple } To access return value using C++ 11, we would need something like: char a; int i; bool b; std::tie(a, i, b) = mytuple();  // unpacking tuple into variables Where the variables have to be defined before use and the types known in advance. C++ 17 : auto [a, i, b] = mytuple(); Returning compound objects :  This is the easy way to assign the individual parts of a compound type (such as a struct, pair etc) to different variables all in one go – and have the correct types automatically assigned. So let’s have a look at an ...
Post a Comment
Read more

POST 1 : std::thread in c++ | C++ 11

std::thread   C++  Thread support library std::thread. Threads enable programs to execute across several processor cores. Defined in header Class : thread Member types : native_handle_type Data Member  id    //represents the id of a thread (public member class) Member functions (constructor)    //constructs new thread object (public member function) (destructor)    //destructs the thread object, underlying thread must be joined or detached  (public member function) operator=    //moves the thread object  Observers  // Covered in NEXT POST Operations    // Covered in NEXT POST Constructor :   #include   void f1 ( int n ) { for ( int i = 0 ; i < 5 ; ++ i ) { std:: cout << "Thread 1 executing \n " ; ++ n ; std:: this_thread :: sleep_for ( std:: chrono :: milliseconds ( 10 ) ) ; ...
Post a Comment
Read more