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weak typing

資料來源 : Free On-Line Dictionary of Computing

weak typing
     
         Strict enforcement of {type} rules but with
        well-defined exceptions or an explicit type-violation
        mechanism.
     
        Weak typing is "friendlier" to the programmer than {strong
        typing}, but catches fewer errors at compile time.
     
        {C} and {C++} are weakly typed, as they automatically {coerce}
        many types e.g. {ints} and {floats}.  E.g.
     
         int a = 5;
         float b = a;
     
        They also allow ignore {typedefs} for the purposes of type
        comparison; for example the following is allowed, which would
        probably be disallowed in a strongly typed language:
     
         typedef int Date;    /* Type to represent a date */
         Date a = 12345;
         int b = a;       /* What does the coder intend? */
     
        C++ is stricter than C in its handling of enumerated types:
     
         enum animal {CAT=0,DOG=2,ANT=3};
         enum animal a = CAT;  /* NB The enum is optional in C++ */
         enum animal b = 1;    /* This is a warning or error in C++ */
     
        (2000-07-04)
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