lecture-8b - 1 C Classes Continued Object Oriented...

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Object Oriented Programming C++ Classes R.B. Lenin Winter 2006 DA-IICT 1 C++ Classes: Continued
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2 Object Oriented Programming C++ Classes R.B. Lenin Winter 2006 DA-IICT const (Constant) Objects and const Member Functions • Principle of least privilege • Only give objects permissions they need, no more •K e y w o r d const • Specify that an object is not modifiable • Any attempt to modify the object is a syntax error • For example: const time noon( 12, 0, 0 ); • Declares a const object noon of class time and initializes it to 1 2 noon
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3 Object Oriented Programming C++ Classes R.B. Lenin Winter 2006 DA-IICT const (Constant) Objects and const Member Functions (II) const objects require const functions – Functions declared const cannot modify the object const specified in function prototype and definition Prototype: ReturnType FunctionName(param1,param2…) const; Definition: ReturnType FunctionName(param1,param2…) const { …}; Example: int A::getValue() const {return privateDataMember};
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lecture-8b - 1 C Classes Continued Object Oriented...

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