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GO(I3£¬S)={ A?S?A£¬S??AS£¬S??b£¬A??SA£¬A??a}=I5

GO(I3£¬A)={ A?SA?£¬S?A?S£¬S??AS£¬S??b£¬A??SA£¬A??a}=I6 GO(I4£¬a)={ A?a?}=I1 GO(I4£¬b)={ S?b?}=I2

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GO(I5£¬S)={ A?S?A£¬S??AS£¬S??b£¬A??SA£¬A??a}=I5

GO(I5£¬A)={ A?SA?£¬S?A?S£¬S??AS£¬S??b£¬A??SA£¬A??a}=I6 GO(I6£¬a)={ A?a?}=I1 GO(I6£¬b)={ S?b?}=I2

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GO(I7£¬S)={ A?S?A£¬S??AS£¬S??b£¬A??SA£¬A??a}=I5

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P164¨C5

(1)

E?E1£«T {if (E1.type = int) and (T.type = int ) then E.type := int else E.type := real} E?T {E.type := T.type} T?num.num {T.type := real} T?num {T.type := int} (2)

P164¨C7

S?L1|L2

{S.val:=L1.val+(L2.val/2L2.length)}

S?L {S.val:=L.val}

L?L1B {L.val:=2*L1.val + B.val; L.length:=L1.length+1} L?B {L.val:=B.c;

L.length :=1} B?0 {B.c:=0} B?1 {B.c:=1} ***********************/

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P217¨C1

a*(-b+c) a+b*(c+d/e) -a+b*(-c+d)

ab@c+* abcde/+*+ a@bc@d+*+

?A??(C??D) A?CD????

AB?C@D?? AB?CD@E???

(A?B)?(?C?D)

(A?B)?(C??D?E)

if (x+y)*z =0 then (a+b)¡üc else a¡üb¡üc xy+z*0= ab+c¡üabc¡ü¡ü £¤ »ò xy+z*0= P1 jez ab+c¡ü P2 jump abc¡ü¡ü

P1 P2

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P217¨C3

-(a+b)*(c+d)-(a+b+c)µÄ ÈýԪʽÐòÁÐ: (1) +, a, b (2) @, (1), - (3) +, c, d (4) *, (2), (3) (5) +, a, b (6) +, (5), c (7) -, (4), (6) ¼ä½ÓÈýԪʽÐòÁÐ: ÈýԪʽ±í£º (1) +, a, b (2) @, (1), - (3) +, c, d (4) *, (2), (3) (5) +, (1), c (6) -, (4), (5) ¼ä½ÓÂë±í£º (1) (2) (3) (4) (1) (5) (6)

ËÄԪʽÐòÁÐ: (1) (2) (3) (4) (5) (6) (7)

+, a, b, T1 @, T1, -, T2 +, c, d, T3 *, T2, T3, T4 +, a, b, T5 +, T5, c, T6 -, T4, T6, T7

P218¨C4

×Ô϶øÉÏ·ÖÎö¹ý³ÌÖаѸ³Öµ¾ä·­Òë³ÉËÄԪʽµÄ²½Öè:A:=B*(-C+D) ²½Öè ÊäÈë´® Õ» PLACE ËÄԪʽ (1) A:=B*(-C+D)

(2) :=B*(-C+D) i A (3) B*(-C+D) i:= A- (4) *(-C+D) i:=i A-B

(5) *(-C+D) i:=E A-B

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(6) (7) (8) (9) (10) (11) (12) (13) (14) *(-C+D) i:=E (-C+D) i:=E* -C+D) i:=E*( C+D) i:=E*(- +D) i:=E*(-i +D) +D) D) ) i:=E*(-E i:=E*(E i:=E*(E+

A-B A-B- A-B-- A-B--- A-B---C A-B---C A-B--T A-B--T-

11(@,C,-, T)

1 i:=E*(E+i A-B--T-D

(15) ) i:=E*(E+E A-B--T1(16) ) i:=E(E A-B--T1-D (17) i:=E*(E) A-B--T2(18) i:=E+E 2- A-B-T(19)

2 i:=E

A-T

(20) 3A

²úÉúµÄËÄԪʽ£º (@,C,-, T1) (+,T,D,T)

(*,B,1T22,T3) (:=,T3,-,A)

P218¨C5

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ÉèA £º10*20£¬B¡¢C¡¢D£º20£¬¿í¶ÈΪw£½4 ÔòT1:= i * 20 T1:=T1+j T2:=A¨C84 T3:=4*T1

Tn:=T2[T3] //ÕâÒ»²½ÊǶàÓàµÄ T4:= i + j T5:=B¨C4 T6:=4*T4 T7:=T5[T6] T8:= i * 20 T8:=T8+j T9:=A¨C84 T10:=4*T8 T11:=T9[T10] T12:= i + j T13:=D¨C4 T14:=4*T12 T15:= T13[T14] T16:=T11+T15 T17:=C¨C4

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(+,T1,D,T2)

(*,B,T,T(:=,T23)

3,-,A)

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