Initializing a const Data Member with a Member Initializer - C++ Class

C++ examples for Class:Member Function

  1. HOME
  2. C++
  3. Class
  4. Member Function

Description

Initializing a const Data Member with a Member Initializer

Demo Code

                                                                                                                                                   
#include <iostream> 
using namespace std; 
class Counter /* w w  w .  java  2s  .co m*/
{ 
public: 
    Counter( int c = 0, int i = 1 ); // default constructor 
                                                                                                                                                   
    // function addCounter definition 
    void addCounter() 
    { 
        count += increment; 
    } // end function addCounter 
                                                                                                                                                   
    void print() const; // prints count and increment 
private: 
    int count; 
    const int increment; // const data member 
}; // end class Counter 
                                                                                                                                                   
                                                                                                                                                   
// constructor 
Counter::Counter( int c, int i ) : count( c ), increment( i ) // required initializer for const member 
{ 
}
                                                                                                                                                   
// print count and increment values 
void Counter::print() const 
{ 
   cout << "count = " << count << ", increment = " << increment << endl; 
}
                                                                                                                                                   
#include <iostream> 
using namespace std; 
                                                                                                                                                   
int main() 
{ 
   Counter value( 10, 5 ); 
                                                                                                                                                   
   cout << "Before incrementing: "; 
   value.print(); 
                                                                                                                                                   
   for ( int j = 1; j <= 3; ++j ) 
   { 
       value.addCounter(); 
       cout << "After increment " << j << ": "; 
       value.print(); 
   }
}

Result


Related Tutorials