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The rename() function changes the name of an existing disk file. Syntax The function prototype is in STDIO.H as follows: int rename(const char *oldname, const char *newname); Arguments The filenames pointed to by oldname and newname follow the rules given earlier in this unit. The only restriction is that both names must refer to the same disk drive; you cannot "rename" a file to a different disk drive. Return Value The function rename() returns 0 on success, or -1 if an error occurs. Errors can be caused by the following conditions (among others):
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