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Chapter 4. Conversions > Gotcha #32: Misunderstanding Pointer-to-Pointer-to-Con...
Gotcha #32: Misunderstanding Pointer-to-Pointer-to-Const Conversion
The happily simple state of conversions that holds for pointer to const does not hold in the case of pointer to pointer to const. Consider an attempt to convert a pointer to a pointer to a char to a pointer to a pointer to a const char (that is, to convert char ** to const char **):
char **ppc;
const char **ppcc = ppc; // error!
