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/J - Change Default char Type

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This option changes the default char type from signed to unsigned. This option is useful when you are working with character data that you intend to localize. If a char value is explicitly declared signed, the /J option does not affect it, and the value is sign extended when widened to int type. With the /J option, the char type is zero extended when widened to an int type.

When you specify /J, the compiler automatically defines the identifier _CHAR_UNSIGNED, which is used with #ifndef in the LIMITS.H include file to define the range of the default char type.

Neither ANSI C nor C++ requires a specific implementation of the char type.

See Also

About Microprocessor Compilers | ARM Guide | Hitachi Guide | MIPS Guide

 Last updated on Thursday, April 08, 2004

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