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GNU Info (g77-295.info)Alternate ReturnsAlternate Returns (SUBROUTINE and RETURN) ========================================= Subroutines with alternate returns (e.g. `SUBROUTINE X(*)' and `CALL X(*50)') are implemented by `g77' as functions returning the C `int' type. The actual alternate-return arguments are omitted from the calling sequence. Instead, the caller uses the return value to do a rough equivalent of the Fortran computed-`GOTO' statement, as in `GOTO (50), X()' in the example above (where `X' is quietly declared as an `INTEGER(KIND=1)' function), and the callee just returns whatever integer is specified in the `RETURN' statement for the subroutine For example, `RETURN 1' is implemented as `X = 1' followed by `RETURN' in C, and `RETURN' by itself is `X = 0' and `RETURN'). automatically generated by info2www version 1.2.2.9 |