Always redefine the assignment operator in classes that include a pointer value.

• Always redefine the assignment operator in classes that include a pointer value.

const box & operator = (box & left, const box & right) { left.value = right.value; return left;

}

const box & operator = (box & left, int right) { left.value = right; return left;

}

box c;

c = a;

b = 2 + (a = 3);

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