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romkan_ungetc()  ?????޻???̾?Ѵ? ?Ѵ?ʸ???Υץå????Хå?

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#include <wnn/rk_spcl_val.h>
letter romkan_ungetc(c)
letter c;

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romkan_ungetc ?ϡ??Ѵ?ʸ?????ϴؿ? romkan_getc ???????줿ʸ???򡢣?ʸ???? ???ץå????Хå????뤿?????Ѥ??롣??ʸ???ʾ??Υץå????Хå??ϤǤ??ʤ???

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romkan_init(JT_LIB), romkan_getc(JT_LIB), romkan_clear(JT_LIB), romkan_dispmode(JT_LIB), romkan_next(JT_LIB), 2A_CTRL(JT_ENV), 2B_ROMKANA(JT_ENV)