Pointer declaration for data member, C/C++ Programming

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Pointer declaration for data member: Method 1:

int M::* px; // This is known as pointer-to-member declared for class member of A.

px = &M::x;//The pointer px is pointing to the data member m in the class A. int S1;

S1=m.*px;

Method 2: M *pm; pm=&m; int M::*py; py=&M::y; int S2;

S2=pm->*py;//pointer-to-object->*pointer-to-member function

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