Const local variablessuggest change
Declaration and usage.
// a is const int, so it can't be changed const int a = 15; a = 12; // Error: can't assign new value to const variable a += 1; // Error: can't assign new value to const variable
Binding of references and pointers
int &b = a; // Error: can't bind non-const reference to const variable const int &c = a; // OK; c is a const reference int *d = &a; // Error: can't bind pointer-to-non-const to const variable const int *e = &a // OK; e is a pointer-to-const int f = 0; e = &f; // OK; e is a non-const pointer-to-const, // which means that it can be rebound to new int* or const int* *e = 1 // Error: e is a pointer-to-const which means that // the value it points to can't be changed through dereferencing e int *g = &f; *g = 1; // OK; this value still can be changed through dereferencing // a pointer-not-to-const
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