Set floating-point rounding mode for formatted input/output.
Sets the ROUND= specifier globally for all formatted input/output operations.
With -iorounding=compatible, the value resulting from data conversion is the one closer to the two nearest representations, or the value away from zero if the value is halfway between them.
With -iorounding=processor-defined, the rounding mode is the processor’s default mode. This is the default when -iorounding is not specified.