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Where does the member should be defined if it is used in the program?

(a) Namespace scope

(b) Character scope

(c) Namespace & Character scope

(d) Directional scope

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I'm obligated to ask this question of Numeric Limits topic in section Strings, Streams & Numerics in C++ of C++

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The correct choice is (a) Namespace scope

Explanation: The member shall still be defined in a namespace scope if it is used in the program.

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