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C) TYPE pro.c>PRN D) TYPE abc.txt
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A) REN A:file1 C:F1 B) RENAME A: A:file1 C:F1
C) REN A:file1 F1 D) REN A:file1 \SUB\F1
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B) ËùÓÐDOSÓ¦ÓóÌÐò¶¼²»ÄÜÔÚWindows²Ù×÷ϵͳÖÐÕýÈ·ÔËÐÐ
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(16) ÏÂÃæÄÜÕýÈ·Êä³öASCIIÂëֵΪ52µÄ×Ö·ûµÄÓï¾äÊÇ
A£©Writeln(Ord(52)); B) Writeln(Perd(52));
C£©Writeln(Chr(52)); D) Writeln(Succ(52));
(17) Éèn¸öÈË´Ó1µ½n±àºÅ£¬ÒÑ˵Ã÷Ëĸö¼¯ºÏ±äÁ¿Oldpeople¡¢males¡¢smokersºÍdrinkers·Ö±ð±íʾÀÏÈË¡¢ÄÐÈË¡¢³éÑÌÕߺÍÐï¾ÆÕߵıàºÅ¼¯ºÏ£¬¼ÙÉèËĸö¼¯ºÏ¶¼Òѱ»¸³Öµ£¬Ôò±íʾ³éÑÌ»ò×þƻòÁ½Õß¶¼°®ºÃµÄ¼¯ºÏ±í´ïʽÊÇ
A£©[l..n] B) [l..n]-smokers-drinkers
C) smokers+drinkers D) smokers*drinkers
(18) ÒÑÖª±äÁ¿waterflow=1ºÍoutputvalue=0¡£ÏÂÃæ²»ÄÜÊä³ö×Ö·û´®Value openµÄÓï¾äÊÇ
A£©IF(waterflow=1)AND(outputvalue=0)THEN Writeln('Value open');
B£©IF(waterflow=1)OR(outputvalue=0) THEN Writeln('Value open');
C£©IF(waterflow=0)OR(outputvalue=0) THEN Writeln('Value open');
D£©IF(waterflow=1)AND (outputvalue=1) THEN Writeln('Value open');
(19) Ôڽṹ»¯³ÌÐòÉè¼ÆÖÐËù˵µÄ³ÌÐòµÄÈýÖÖ»ù±¾½á¹¹ÊÇÖ¸
A£© Ö÷º¯Êý¡¢º¯Êý¡¢¹ý³Ì B£© ˳Ðò¡¢Ñ¡Ôñ¡¢Ñ»·
C£© ³ÌÐòÊײ¿¡¢ËµÃ÷²¿·Ö¡¢Óï¾ä²¿·Ö D£©WHILE¡¢REPEAT¡¢FOR
(20) ÏÂÃæ¶Ô×Ó½çÀàÐÍtt¶¨ÒåÕýÈ·µÄÊÇ
A£©TRPE tt=10..100; B) TYPE tt='a'..h;
B) TYPE tt='a'..'Z'; D) TYPE tt=100..10;
(21) ÏÂÃæ³£Á¿¶¨ÒåºÏ·¨µÄÊÇ
A£©CONST a=b=10 ; B) CONST x;3.5;
C) CONST pl:=3.14; D) CONST s=2.789;
(22) ÒªÅжÏ×Ö·ûÐͱäÁ¿chµÄÖµÊÇ·ñΪСд×Öĸ£¬ÏÂÃæÕýÈ·µÄ±í´ïʽÊÇ
A£©ch IN [` a`..`z`] B) `a`<=ch<=`z`;
C) (ch.>=a)AND (ch<=z) D) Ord(ch)<=Ord(`z`)
(23) ÏÂÁзûºÅÖУ¬·ûºÏPASCAL¹æ¶¨µÄ×Ö·ûÐÍÖµµÄÊÇ
A£© 'abc' B) '@' C) `` D) ```
(24) ÉèÓбäÁ¿ËµÃ÷
VAR i,j:Integer;
x,y:Real;
a,b:Boolean:
c:Char;
²¢Éè¸÷±äÁ¿¾ùÒѸ³Öµ£¬ÏÂÁÐÓï¾äÖÐÕýÈ·µÄÊÇ
A£©i:=i+x; B) b:=Ord(c>`c'); C) a:=i=j; D) i:=x MOD y;
(25) ÉèÓÐÏÂÁÐÓï¾ä
FORI:=1 TO 5 DO
FORJ:=5 TO 1 DO
Read(a,b,c);
A) 25 B) 0 C) 5 D) 1
(26) ÉèÓÐ˵Ã÷£ºTYPE tt=1..10;
VAR a:Real;x,y:tt;
PROCEDURE five(VAR m,n:Real; z:tt);
ÏÂÃæ¶Ô¹ý³Ìfiveµ÷ÓÃÕýÈ·µÄÊÇ
A£©five(a,a,9); B) five(y,a,15); C) five(5,x,y); D) five(x,y,a);
(27) ÒÑÖªÓÐÈçÏÂ˵Ã÷
VAR a:ARRAY[-2..2] OF Integer;
i,j:Integer;
³ÌÐò¶Î
j£º=1£»
FOR i:=2 DOWNTO -2 DO
a[i]:=j+i;
Writeln(a[2]-a[-2]);
¸Ã³ÌÐò¶ÎºóÊä³öµÄÊÇ
A£©0 B£©4 C£©1 D£©5
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A£©Ö¸ÏòÕûÐ͵ÄÖ¸ÕëÀàÐÍ B£©Ò»Î¬Êý¾ÝÀàÐÍ
C£©¼Ç¼ÀàÐÍ D£©¼¯ºÏÀàÐÍ
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A£©REPEAT-UNTILÑ»·Óï¾ä B£©FORÑ»·Óï¾ä
C£©WHILEÑ»·Óï¾ä D£©²»´æÔÚ´ËÖÖÓï¾ä
(30) ÉèÓм¯ºÏa=[1,3,5,7,9]£¬b=[2,4,6,8,10]£¬c=[1,2,3,4,5],d=[ ]£¬ÏÂÃæ±í´ïʽµÄֵΪFalseµÄÊÇ
A£©d<=(a*c) B) (b*c)=d+[2,4] C) 5 IN ((a-b)-c) D£©c<=(a+b)
(31) ³ÌÐò¶Î
i£º=1
REPEAT
n:=i*i;
i:=i+1;
UNTIL n>i
ÖÐÑ»·ÌåÖ´ÐеĴÎÊýÊÇ
A£©1 B£©2 C£©3 D£©4
(32) ÓÐÏÂÃæIFÓï¾ä
IF flag=1 THEN number:=10
ELSE IF flag=2 THEN number:=20;
ELSE IF flag=3 THEN number :=40;
½«¸ÃIFÓï¾äת»»³ÉÏÂÃæµÄCASEÓï¾ä£¬ÕýÈ·µÄÊÇ
A£©CASE flag OF B) CASE number OF
1:number:=10; 10:flag:=1;
2:number:=20; 20:flag:=2;
DEFUALT:number:=40 40:flag:=3
END; END;
C) CASE flag/10+1 OF D) CASE flag OF.
1:number:=10; 1:number:=10;
2:number:=20; 2:number:=20;
3:number:=40 3:number:=40
END; END;
(33) Éèm£¬n¾ùΪÕûÊýÀàÐͱäÁ¿£¬ÇÒÁ½ÕßµÄÊýÖµ¾ù²»´óÓÚ1000¡£ÏÂÃæÓï¾ä
m:=m+n n:=m-n m:=m-n
Ö´Ðк󣬲úÉúµÄ½á¹ûÊÇ
A£©m£¬nµÄÖµ±£³Ö²»±ä B£©m£¬nµÄÖµ½øÐÐÁ˽»»»
C£©m£¬nµÄÖµ¾ùΪÔÀ´MµÄÖµ D£©m£¬nµÄÖµ¾ùΪÔÀ´NµÄÖµ
(34) ÏÂÊöÃüÌâÖÐÕýÈ·µÄÊÇ]
A£©µ¥Á´±íÖеÄÿ¸ö½áµã±ØÐëÓÐÖ¸ÕëÓò
B£©µ¥Á´±í½áµã¸öÊýÊǹ̶¨µÄ
C£©µ¥Á´±íµÄ½áµã¿ÉÒÔËæ»ú·ÃÎÊ
D£©µ¥Á´±íËùÓнáµãµÄÖ¸ÕëÓòÖÐÖµÒ»¶¨Ïàͬ
(35) ÏÂÃæ±í´ïʽµÄÖµµÈÓÚFalseµÄÊÇ
A£©Odd(Round(-8+3.5)) B) 5 DIV 2=5/2
C) NOT('abc'>'abc1') D) Ord(Chr(Pred(8)))>=7
(36) Éè±äÁ¿ËµÃ÷
TYPE t=(a,b,c);
ÔòÏÂÁÐÊý×鶨ÒåÖдíÎóµÄÊÇ
A£©VAR s:ARRAY[1..5] OF ARRAY[t] OF Integer;
B£©VAR s:ARRAY[1..5,t] OF Integer;
C£©VAR s:ARRAY[Boolean] [t] OF Integer;
D£©VAR s:ARRAY[1..5,Boolean,t] OF Integer;
(37) °´Îļþ´æ´¢·½Ê½¿ÉÒÔ°ÑÎļþ·ÖΪ
A£©ÀàÐÍÎļþºÍÎı¾Îļþ B£©Ë³ÐòÎļþºÍËæ»úÎļþ
C£©ÄÚ²¿ÎļþºÍÍⲿÎļþ D£©³ÌÐòÎļþºÍÊý¾ÝÎļþ
(38) ÏÂÁзûºÏPascalÓï·¨¹æÔòµÄ¹ý³Ì»òº¯ÊýÊÇ
A£©FUNCTION f(x:Integer):Integer; B) PROCEDURE p(VAR x:Integer):Integer;
VAR VAR y:Integer;
y:Integer; BEGIN
BEGIN x:=y+1;
y:=3*x+2; Writeln(x)
f:=y END;
END;
C) PROCEDURE p(x:Integer); D) FUNCTION f(x:Integer);
BEGIN BEGIN
p:=x+10 f:=x+10
END; END;
(39) ÏÂÃæÃèÊö´íÎóµÄÊÇ
A) Read(c);µÈ¼ÛÓÚRead(Input,c); B) Writeln;µÈ¼ÛÓÚWriteln(Output);
C) Eof µÈ¼ÛÓÚ Eof(Input) D£©EolnµÈ¼ÛÓÚEoln(output)
(40) ÓÐÏÂÁгÌÐò
PROGRAM p40 (Input,Output);
VAR n:Integer;
PROCEDUER p(Integer;VAR b:Integer);
BEGIN
a:=a+b;
b:=b*a
END;
BEGIN
n:=8;
p(n,n);
Writeln(n);
END.
¸Ã³ÌÐòµÄÔËÐнá¹ûÊÇ
A£©8 B£©16 C£©128 D£©256
(41) ÀàÐͶ¨ÒåÈçÏÂ
TYPE
tl=RECORD
a:Integer;
r:t2;
END;
t2=RECORD
a:Integer;
b:Real;
END;
ÔÚ¸ÃÀàÐͶ¨ÒåÖдíÎóÊÇ
A£©¼Ç¼ÀàÐÍt2µÄ¶¨ÒåǰȱÉÙ±£Áô×ÖTYPE
B£©ÔÚ±£Áô×ÖRECORD֮ǰûÓÐʹÓÃðºÅ¶øÊ¹ÓÃÁ˵ȺÅ
C£©¼Ç¼ÀàÐÍt2µÄ¶¨Òå·ÅÔÚÁËt1µÄ¶¨ÒåÖ®ºó
D£©ÔڼǼÀàÐÍt1ºÍt2ÖÐʹÓÃÁËÏàͬµÄÓòÃû
(42) ÓÐÈçϳÌÐò
PROGRAM p42 (Input, Output);
VAR
a:ARRAY[1..3] OF Integer;
i,j:Integer;
BEGIN
FOR i:=1 TO 3 DO
a[i]:=i;
i:=1; j:=3;
REPEAT
a[i]:=a[j]+l;
i:=i+l;
j:=j-1;
UNTIL i>3;
FOR i:=1 TO 3 DO
Write(a[i]:5);
END.
¸Ã³ÌÐòµÄÔËÐнá¹ûÊÇ
A) 4 3 2 B) 2 3 4 C) 4 5 3 D) 4 3 5
(43) ÉèÓÐÈçÏÂÀàÐͺͱäÁ¿ËµÃ÷
TYPE
r1=RECORD
x:Integer;
y:Real;
END;
r2=RECORD
a:r1;
b:Integer;
END;
VAR t:r2;
ÏÂÁÐÓï¾äÖдíÎóµÄÊÇ
A£©Read(t.a.x); B) WITH t DO
Read(a.x);
C) WITH r2, r1 DO; D) WITH t, a DO;
Read(x); Read(x);
(44) ÓÐÈçϺ¯Êý
FUNCTION s(VAR f:Text): Integer;
VAR num:Integer;
BEGIN
Reset(f);
num:=0;
WHILE NOT Eof(f) DO
BEGIN
Readln(f);
num:=num+1
END;
s:=num
END;
¸Ãº¯ÊýµÄ¹¦ÄÜÊÇ
A£©Í³¼ÆÎı¾ÎļþÖÐÎı¾µÄÐÐÊý
B£©Í³¼ÆÎı¾ÎļþÖÐÿÐеÄ×Ö·ûÊý
C£©½«ÎļþÖ¸Õëµ÷Õûµ½ÎļþµÄ×îºóÒ»ÐпªÊ¼Î»Ö㬲¢·µ»Ø¸ÃÐеÄ×Ö·û¸öÊý
D£©Í³¼ÆÎı¾ÎļþÖÐ×Ö·û×ÜÊý
(45) ÓÐÈçÏ£µÐÐÓï¾ä
IF year MOD 4=0 THEN
IF year MOD 100<>0 THEN leap:=1
ELSE IF year MOD 400=0 THEN leap:=1
ELSE leap:=0
ELSE leap:=0
ÓëÉÏÊö5ÐÐÓï¾äµÈ¼ÛµÄÓï¾äÊÇ
A£©IF£¨year MOD 4=0£©AND(year MOD 100=0) THEN leap:=1
ELSE leap:=0;
B£©IF( year MOD 4=0) AND(year MOD 100<>0) OR (year MOD 400=0)
THEN leap:=1 ELSE leap:=0;
C£©IF(year MOD 4=0) OR(year MOD 400=0) THEN leap:=1
ELSE leap:=0;
D£©IF( year MOD 4=0) AND(year MOD 400=0)OR NOT (year MOD 100=0)
THEN leap:=1 ELSE leap:=0;
(46) ÓÐÈçϳÌÐò
PROGRAM p46(Input,Output);
VAR p1,p2,p3:^Interger,
BEGIN
New(p1);New(p2);New(p3);
p1^:=3; p2^:=5; p3^:=7;
p1:=p2;p2:=p3; p3:=p1;
Writeln(p1^:3,p2^:3,p3^:3);
END.
¸Ã³ÌÐòµÄÔËÐнá¹ûÊÇ
A) 5 7 5 B) 3 5 7 C) 5 7 3 D) 5 5 7
(47) ûÓÐÏÂÁк¯Êý˵Ã÷
FUNCTION func(n:integer):integer;
BEGIN
IF n=0 THEN func:=0
ELSE IF n=1 THEN func:=2
ELSE func:=func(n-1)+func(n-2)
END;
±í´ïʽfunc(5)µÄÖµÊÇ
A) 8 B) 6 C) 10 D) 12
(48) ÏÂÁбäÁ¿ËµÃ÷ÖÐÕýÈ·µÄÊÇ
A) VAR a:RECORD B) VAR a:RECORD
a,b;Integer; a,b:Integer
CASE flag:(x,y,z) OF CASE flag:(a,b,c) OF
x:( ); a:( )
y:(a:Integer); b:(x:Integer);
z:(b,c:Integer) c:(y,z:Integer)
END; END;
C) VAR a:RECORD D) VAR a:RECORD
n,m:Integer; a,b:Integer;
CASE flag(a,b,c) OF CAST flag:(x,y,z) OF
a:( ); x:( );
b:(x:Integer); y:(x:Integer);
c:(y,z:integer) z:(y,z:Integer)
END; END;
(49) ÄÜÕýÈ·Êä³ö¡¡¡¡ A B C D E F µÄ³ÌÐò¶ÎÊÇ
A£©loop:='A'; B) loop:='F'
WHILE loop<='F' DO WHILE loop>'A' DO
BEGIN BEGIN
Writeln(loop,''); Write(loop,'');
loop:=Succ(loop) loop:=Pred(loop)
END; END;
C) loop:='A'; D) loop:='A'
WHILE loop<='F' DO WHILE loop<F DO
BEGIN BEGIN
Write(loop,''); Write(loop,'');
loop:=Succ(loop) loop:=Succ(loop)
END; END;
(50) ÓÐÏÂÃæ³ÌÐò¶Î
IF x>=5 THEN
IF y<3 THEN z:=1
ELSE z:=2
ELSE
IF y<2 THEN z:=3
ELSE z:=4;
¸Ã³ÌÐò¶ÎÖ´Ðк󣬱äÁ¿£úµÄÖµ±äΪ3£¬ÄÇô£¬±äÁ¿x,yµÄÖµÖ»ÄÜÊÇ
A) 6 1 B) 2 2 C) 1 1 D) 3 3
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(3) Òª½«µ±Ç°Å̵±Ç°Ä¿Â¼ÏÂËùÓÐÀ©Õ¹ÃûΪ.TXTµÄÎļþÄÚÈÝÔÚ´òÓ¡»úÉÏ´òÓ¡Êä³ö£¬Ó¦Ê¹Óõĵ¥ÌõDOSÄÚ²¿ÃüÁîΪ ¡¾£³¡¿ ¡£
(4) ÔÚWindows»·¾³Ï£¬¿ÉÒÔÀûÓõ¥»÷¡¢Ë«»÷¡¢Í϶¯ÕâÈýÖÖÊó±ê²Ù×÷Ö®Ò»µÄ ¡¾£´¡¿ ²Ù×÷ʵÏÖ´°¿ÚµÄÒÆ¶¯¡£
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(6) ÉèÓÐÀàÐÍ˵Ã÷¡¡TYPE arr=ARRAY[1..20] OF Integer£»¹ý³ÌprocµÄ×÷ÓÃÊǰÑÊý×éaÖÐϱêÎªÆæÊýµÄÔªËØÖеÄÊý°´ÉýÐòÅÅÐò£¬ÅÅÐò½á¹ûÈÔ·ÅÔÚϱêÎªÆæÊýµÄÔªËØÖУ¬ÇëÌî¿ÕÍê³É¡£
PROCEDURE proc(VAR a:arr);
VAR i,j,k,temp:Integer;
BEGIN
FOR i:=1 TO 10 DO
BEGIN
k:= ¡¾6¡¿
FOR j:=i TO 10 DO
IF a[k]>a[2*j-1] THEN
k:= ¡¾7¡¿
temp:= a[k]; a[k]:=a[2*j-1];a[2*i-1]:=temp;
END;
END;
(7) ¸çµÂºÕ²ÂÏëÊÇ£ºÈÎÒâÒ»¸ö²»Ð¡ÓÚ£¶µÄżÊý¿ÉÒÔ±íʾΪ£²¸öËØÊýÖ®ºÍ¡£ÏÂÃæ³ÌÐò´Ó¼üÅ̽ÓÊÜÒ»¸ö²»Ð¡ÓÚ£¶µÄżÊý£¬ÕÒ³ö×é³ÉËüµÄ£²¸öËØÊýÊä³ö¡£ÀýÈ磺ÈôÊäÈë12,ÔòÊä³ö12=7+5ÇëÌî¿ÕÍê³É?
¡¡ PROGRAM p1(Input,Output);
VAR a,b,x:Interger;
FUNCTION isprime(n:Integer):Boolean;
VAR k:Integer;
prime:Boolean;
BEGIN
prime:=n>1;
FOR k:=2 T0 n DIV 2 DO
prime:= ¡¾8¡¿ AND (n MOD k<>0);
isprime:=prime
END;
BEGIN
REPEAT
Readln(x) ;
UNTIL NOT Odd(x)AND(x>5);
a:=x;
REPEAT
REPEAT
a: =a-1;
UNTIL ¡¾9¡¿ ;
b:= ¡¾10¡¿ ;
UNTIL isprime(b);
Writeln(x,'=',a,'+',b)
END.
(8) ÏÂÃæ³ÌÐòµÄ¹¦ÄÜÊǶԼüÅÌÊäÈëµÄÒ»´®Ð¡Ð´×Öĸ¼ÓÃÜ£¬¼ÓÃÜ·½·¨ÊÇ£º°ÑÒª¼ÓÃܵÄ×ÖĸºóÒÆx¸ö×Öĸ£¨ÈôÒѺóÒÆµ½'z'£¬ÔÙºóÒÆ¾Í³ÉΪ'a'£©£¬¶øxµÈÓÚ¸Ã×ÖĸÔÚ×Öĸ±íÖеÄ˳ÐòºÅ¡£ÀýÈ磺
'a'µÄ˳ÐòºÅΪ1£¬ÔòºóÒÆ1¸ö×Öĸ£¬³ÉΪ'b';
'b'µÄ˳ÐòºÅΪ2£¬ÔòºóÒÆ2¸ö×Öĸ£¬³ÉΪ'd';
'y'µÄ˳ÐòºÅΪ25£¬ÔòºóÒÆ25¸ö×Öĸ£¬³ÉΪ'x';
'z'µÄ˳ÐòºÅΪ26£¬ÔòºóÒÆ26¸ö×Öĸ£¬³ÉΪ'z'¡£
ÈôÊäÈë'abcdefgxyz'£¬ÔòÊä³ö'bdfhjlnvxz'¡£ÇëÌî¿ÕÍê³É¡£
¡¡ PROGRAM p3(Input,Output);
VAR i,j,k,n:Integer;
ch:Char;
a,b:ARRAY[1..80] OF Char;
BEGIN
k:=1; Read(a[k]);
WHILE NOT Eoln DO
BEGIN
k:=k+1;Read(a[k])
END;
Readln;
FOR i:=1 TO k DO
BEGIN
IF a[i] IN ['a'..'z'] THEN
BEGIN
n:=Ord(a[i]-Ord('a');
FOR j:=1 TO ¡¾11¡¿ DO
IF a[j]:='z' THEN
a[i]:= ¡¾12¡¿
ELSE
a[i]:= ¡¾13¡¿ ;
END;
Write(a[i]);
END;
Writeln
END.
(9) ¹ý³ÌcreateµÄ×÷ÓÃÊÇ´Ó¼üÅÌÊäÈëÈô¸É¸ö×Ö·û£¨ÊäÈë'*'ʱ½áÊø£©£¬È»ºó½¨Á¢Ò»¸öµ¥Ñ»µÁ´±í£¬Á´±íµÄÿ¸ö½ÚµãÉÏÓÐÒ»¸ö×Ö·û£¨²»º¬'*'×Ö·û£©£¬±ä²ÎheadÖ¸ÏòÁ´±íµÄij¸ö½Úµã¡£ÇëÌî¿ÕÍê³É¡£
TYPE link=^node;
node=RECORD
data:Char;
next:link
END;
PROCEDURE create(VAR head:link);
VAR p,q:link; ch:Char;
BEGIN
p:=NIL;
Read(ch);
WHILE ch<>'*' DO
BEGIN
New(head);
head^.data:=ch;
head^.next:= ¡¾14¡¿ ;
I F p=NIL THEN
q:= ¡¾1£µ¡¿
p:=head; Read(ch)
END;
IF p<>NIL THEN
q^.next:= ¡¾16¡¿ ;
END;
(10) Ëæ»úÎļþstudents.datÖдæ·ÅµÄÊÇÈô¸É¸öѧÉúµÄѧºÅ¡¢ÐÕÃûºÍ°àºÅ£¬ÎļþÖмǼµÄ˳ÐòÊǰ´Ñ§ºÅÒÔÉýÐòÅÅÐòµÄ¡£ÏÂÃæµÄ³ÌÐò´Ó¼üÅ̽ÓÊÜÒ»¸öѧºÅ£¬ÔÙÓö԰ë²éÕҵķ½·¨ÔÚÎļþÖÐÕÒ³ö¸ÃѧºÅµÄѧÉú²¢Êä³öÆäÐÕÃû£¬ÈôûÕÒµ½£¬ÔòÊä³ö'Not found!'¡£ÇëÌî¿ÕÍê³É¡£
PROGRAM search(Input Output);
TYPE rec=RECORD
number :Integer; {ѧºÅ}
name :STRING; {ÐÕÃû}
class :STRING; {°àºÅ}
END£»
VAR f: ¡¾17¡¿ ;
a:rec;
x,top,bottom,mid;Integer;
BEGIN
Writeln('Input a number:');
Readln(x);
Assign(f,'students.dat');
¡¾18¡¿ ;
top:=0 bottom:=Filesize(f)-1;
REPEAT
mid:=(top+bottom) DIV 2;
Seek( ¡¾19¡¿ );
Read(f,a);
IF a.number>x THEN
Bottom:=mid-1
ELSE
IF a.number<x THEN
top:=mid+1
UNTIL( ¡¾20¡¿ ) OR (x=a.number);
Close(f);
IF x=a.number THEN
Writeln(a.name)
ELSE
Writeln('Not found!')
END.
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