30 lines
1.5 KiB
C++
30 lines
1.5 KiB
C++
// fig07_08.cpp
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// Attempting to modify a constant pointer to nonconstant data.
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int main() {
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int x, y;
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// ptr is a constant pointer to an integer that can be modified
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// through ptr, but ptr always points to the same memory location.
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int* const ptr{&x}; // const pointer must be initialized
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*ptr = 7; // allowed: *ptr is not const
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ptr = &y; // error: ptr is const; cannot assign to it a new address
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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