Testing empty function ---------------------- Emptying s2="irregular" gives s2=""   void empty(charPtr& s) { /* Empties the cstring s so that s is modified to an empty cstring. That is the memory allocated for s is deleted and a new memory is allocated so that s will have no printable characters but it will still have a null character at the end. REMARK: Parameter passing by reference is needed here as given in the function declaration here. */ }

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