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Object Oriented Programming with C++


int i, j, k; // accessible to entire program
int main()
myclass a, b;
a.i = 100; // access to i, j, and k is OK
a.j = 4;
a.k = a.i * a.j;
b.k = 12; // remember, a.k and b.k are different
cout << a.k << " " << b.k;
return 0;
3. Scope resolution operator
As you know, the :: operator links a class name with a member name in order to
tell the compiler what class the member belongs to. However, the scope
resolution operator has another related use: it can allow access to a name in an
enclosing scope that is "hidden" by a local declaration of the same name. For
example, consider this
int i;

// global i

void f()
int i; // local i
i = 10; // uses local i
As the comment suggests, the assignment i = 10 refers to the local i. But what if
function f( ) needs to access the global version of i? It may do so by preceding the
i with the :: operator, as shown here.
int i;

// global i

void f()
int i; // local i
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