The memory buffer returned by operator new is guaranteed to have the suitable alignment properties for any type object. This property enables you to construct objects on such a pre-allocated char array. For example:
#include #include #include using namespace std;class Employee{ /*...*/};void f(){ char * pc = new char[sizeof(Employee)]; Employee *pemp = new (pc) Employee; //construct on properly aligned char array //...use pemp pemp->Employee::~Employee(); //explicit destruction delete [] pc;} 
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