Suppose we have the following namespace: namespace A { void f(int); //. . . } using namespace A; // In the global namespace void g() { f(‘a’); // calls A::f(int) } In the global namespace, the function g( ) calls f(‘a’). There is no problem here, f(‘a’) is unambiguously A::f(int). Now suppose at some later time, the following namespace grouping and using directive is inserted prior to the call to function f. namespace B { void f(char); //. . . } using namespace B; For convenience, all these are listed again. namespace A { void f(int); //. . . } using namespace A; namespace B { void f(char); //. . . } using namespace B; // In the global namespace void g() { f(‘a’); } In g(), to what does the call, f(‘a’) resolve? How could the code be modified so that the call still resolves to A::f(int)?

::g() A::f(int) B::f(char)

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