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Synopsis:
    #include <stdio.h>
    int rename( const char *old, const char *new );

Description:
    The rename function causes the file whose name is indicated by the
    string old to be renamed to the name given by the string new.

Returns:
    The rename function returns zero if the operation succeeds, a non-zero
    value if it fails.  When an error has occurred,  errno contains a value
    indicating the type of error that has been detected.

Example:
    #include <stdio.h>

    void main()
      {
        rename( "old.dat", "new.dat" );
      }

Classification:
    ANSI

Systems:
    All