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// Fig. 7.5: fig07_05.cpp
// Attempting to initialize a constant of
// a built-in data type with an assignment.
#include <iostream>
using std::cout;
using std::endl;
class Increment {
public:
Increment( int c = 0, int i = 1 ); // default constructor
void addIncrement()
{
count += increment;
} // end function addIncrement
void print() const; // prints count and increment
private:
int count;
const int increment; // const data member
}; // end class Increment
// constructor
Increment::Increment( int c, int i )
{ // Constant member 'increment' is not initialized
count = c; // allowed because count is not constant
increment = i; // ERROR: Cannot modify a const object
} // end constructor Increment
// print count and increment values
void Increment::print() const
{
cout << "count = " << count
<< ", increment = " << increment << endl;
} // end function print
int main()
{
Increment value( 10, 5 );
cout << "Before incrementing: ";
value.print();
for ( int j = 0; j < 3; j++ ) {
value.addIncrement();
cout << "After increment " << j + 1 << ": ";
value.print();
}
return 0;
} // end main
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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