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RwingRWING

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program NLEQUAT
real x0,x1,XEBC,FEBC,XR,FR,F0,F1
INTEGER IPARA,ICDIS
ITMAX=50
XEBC=1.0E-6
FEBC=1.0E-8
ICDIS=1
PRINT*,"enter IPARA x0 x1"
read 10,IPARA,x0,x1
10 format(I1,2f10.0)
IF(IPARA.EQ.1) THEN
READ 20,ICDIS,ITMAX,XEBC,FEBC
20 FORMAT(2I2,2F10.0)
ENDIF
F0=FUN(X0)
F1=FUN(X1)
IF ((F0*F1).GE.0.) STOP 'ERROR IN ROOT REGEON(X0,X1)'
CALL DHRT
WRITE(*,70)ITER,XR,FR
70    FORMAT(//"NUMBER OF ITERATION:",I15/"EQUATION ROOT",E15.4/"FUNCTION VALUE F(x)=",E15.4)                                                                             
END
SUBROUTINE DHRT
        ITER=0
20        ITER=ITER+1
        XR=(X0+X1)/2
        FR=FUN(XR)
        IF(ICDIS.EQ.1) THEN
WRITE(*,30)ITER,X0,X1,XR,FR
30  FORMAT(1X,I6,3F12.6,F15.6)
    ENDIF
        IF(ABS(FR).LT.FEBC)RETURN
    IF(FR*F0.LT.0.)THEN
        X1=XR
        F1=FR
        ELSE
        X0=XR
        F0=FR
        ENDIF
        IF (ITER.GT.ITMAX)RETURN
        IF(ABC(X0-X1).GT.XEBC) GOTO 20
        RETURN
        END
        FUNCTION FUN(X)
        REAL FUN
    FUN=EXP(-X/4.)*(2.-X)-1.0
        RETURN
        END

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dcbb0217

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Õâ¾ÍÊÇÕÒ²»µ½µ¹Êý¼¸ÐеÄABCº¯Êý£¬Èç¹ûÓеϰ¼ì²é·¾¶ÊÇ·ñÕýÈ·¡£
2Â¥2015-05-04 16:28:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

jiangxingge

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RwingRWING: ½ð±Ò+3, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-05-06 22:36:52
subroutine DHRT µÄ µ¹ÊýµÚÈýÐÐ ABC£¨£© Ó¦¸ÃÊÇ ABS()
3Â¥2015-05-05 08:54:40
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RwingRWING

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ÒýÓûØÌû:
3Â¥: Originally posted by jiangxingge at 2015-05-05 08:54:40
subroutine DHRT µÄ µ¹ÊýµÚÈýÐÐ ABC£¨£© Ó¦¸ÃÊÇ ABS()

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4Â¥2015-05-06 22:34:41
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RwingRWING

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ÒýÓûØÌû:
2Â¥: Originally posted by dcbb0217 at 2015-05-04 16:28:49
Õâ¾ÍÊÇÕÒ²»µ½µ¹Êý¼¸ÐеÄABCº¯Êý£¬Èç¹ûÓеϰ¼ì²é·¾¶ÊÇ·ñÕýÈ·¡£

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5Â¥2015-05-06 22:36:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ RwingRWING µÄÖ÷Ìâ¸üÐÂ
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