DOUBLE PRECISION FUNCTION ADD(A,B)
!DEC$ ATTRIBUTES DLLEXPORT::ADD
!DEC$ ATTRIBUTES STDCALL,ALIAS:'Add'::ADD
    DOUBLE PRECISION:: A,B
    ADD=A+B
END

改为

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DOUBLE PRECISION FUNCTION ADD(A,B)
!DEC$ ATTRIBUTES DLLEXPORT::ADD
!DEC$ ATTRIBUTES STDCALL,ALIAS:'Add'::ADD
    DOUBLE PRECISION:: A,B
    ADD=A+B
END

FUNCTION SORTANDFINDMAX(ARRAY,LENGTH)
!DEC$ ATTRIBUTES DLLEXPORT::SORTANDFINDMAX
!DEC$ ATTRIBUTES STDCALL,ALIAS:'Sortandfindmax'::SORTANDFINDMAX
DOUBLE PRECISION ::ARRAY(LENGTH)
INTEGER::I,J
DOUBLE PRECISION::SORTANDFINDMAX,TEMP
SORTANDFINDMAX=ARRAY(1)
DO I=1,LENGTH-1
    DO J=I+1,LENGTH
        IF(ARRAY(I).GT.ARRAY(J)) THEN
            TEMP=ARRAY(I)
            ARRAY(I)=ARRAY(J)
            ARRAY(J)=TEMP
            SORTANDFINDMAX=ARRAY(J)
            END IF
    END DO
    END DO
END