c-resources/CPlusPlus20ForProgrammers-m.../examples/ch07/fig07_08.cpp

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2024-04-09 06:45:18 +00:00
// fig07_08.cpp
// Attempting to modify a constant pointer to nonconstant data.
int main() {
int x, y;
// ptr is a constant pointer to an integer that can be modified
// through ptr, but ptr always points to the same memory location.
int* const ptr{&x}; // const pointer must be initialized
*ptr = 7; // allowed: *ptr is not const
ptr = &y; // error: ptr is const; cannot assign to it a new address
}
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