1;
Inc(I,b) 使I:=I+b;
dec(i) 使i:=i-1;
dec(I,b) 使I:=I-b;
Abs(x) æ±xçç»å¯¹å¼ ä¾ï¼abs(-3)=3
Chr(x) æ±ç¼å·x对åºçå符ãä¾ï¼Chr(65)=âAâ chr(97)=âaâ chr(48)=â0â
Ord(x) æ±å符x对åºçç¼å·ãä¾:ord(âAâ)=65 ord(âaâ)=97 å¦å¤ï¼ord(false)=0 ord(true)=1
Sqr(x) æ±xçå¹³æ¹ã ä¾ï¼sqr(4)=16
Sqrt(x)æ±xçæ£æ ¹. ä¾ï¼sqrt(16)=4 ï¼PSï¼è´æ°æ¯ä¸è½è¿è¡è¿ç®çï¼å¦æéè¦å°±è¦å
åç»å¯¹å¼ï¼sqrtï¼-4ï¼æ¯éçï¼åºè¯¥ä¸ºsqrtï¼absï¼-4ï¼ï¼
round(x) æ±xçåèäºå
¥ ä¾ï¼round(4.5)=5
trunc(x) æ±xçæ´æ°é¨å ä¾ï¼trunc(5.6)=5 ç»ææ¯integerå
int(x) æ±xçæ´æ°é¨å ä¾int(5.6)=5.0 ç»ææ¯realå
frac (x)æ±xçå°æ°é¨å ä¾ frac(5.6)=0.6
pred(x) æ±xçå导 pred(âbâ)=âaâ pred(5)=4 pred(true)=false
succ(x) æ±xçå继 succ(âbâ)=âcâ succ(5)=6 succ(false)=true
odd(x) å¤æxæ¯å¦ä¸ºå¥æ°ãå¦ææ¯å¼ä¸ºtrueï¼åä¹å¼ä¸ºfalse. Odd(2)=false odd(5)=true
power(a,n) æ±açnæ¬¡æ¹ power(2,3)=8
random å0~1ä¹é´çéæºæ°ï¼ä¸è½åå°1ï¼
randomize éæºæ°çç§åå½æ°,å¨æ¯æ¬¡è®¾ç½®éæºæ°æ¶é½è¦æè¿ä¸ªå½æ°æ¾å¨æåé¢.
Fillchar(a,size(a),0) æ°ç»åå§åï¼å³ææ°ç»açå¼å
¨é¨ç½®ä¸º0
SHR: x SHR n æxæ¢æäºè¿å¶ååå³ç§»nä½ï¼ç¸å½äº æx é¤ä»¥ 2n
SHL: x SHL næxæ¢æäºè¿å¶åå左移nä½ï¼ç¸å½äº æx ä¹ä»¥ 2n
[ç¼è¾æ¬æ®µ]äºãå符串å½æ°
1. è¿æ¥è¿ç® concat(s1,s2,s3â¦sn) ç¸å½äºs1+s2+s3+â¦+sn.
ä¾ï¼concat(â11â,âaaâ)=â11aaâ;
2. æ±å串ã Copy(s,I,L) ä»å符串sä¸æªå第I个å符å¼å§åçé¿åº¦ä¸ºLçå串ã
ä¾:copy(âabdagâ,2,3)=âbdaâ
3. å é¤å串ãè¿ç¨ Delete(s,I,l) ä»å符串sä¸å é¤ç¬¬I个å符å¼å§åçé¿åº¦ä¸ºlçå串ã
ä¾ï¼s:=âabcdeâ;delete(s,2,3);ç»æs:=âaeâ
4. æå
¥å串ã è¿ç¨Insert(s1,s2,I) æs1æå
¥å°s2ç第I个ä½ç½®
ä¾ï¼s:=abc;insert(â12â,s,2);ç»æs:=âa12bcâ
5. æ±å符串é¿åº¦ length(s) ä¾ï¼length(â12abcâ)=5
6. æç´¢å串çä½ç½® pos(s1,s2) å¦æs1æ¯s2çå串 ï¼åè¿ås1ç第ä¸ä¸ªå符å¨s2ä¸çä½ç½®ï¼è¥ä¸æ¯å串ï¼åè¿å0.
ä¾ï¼pos(âabâ,â12abcdâ)=3
7. å符ç大å转æ¢ãUpcase(ch) æ±å符chç大åä½ã
ä¾ï¼upcase(âaâ)=âAâ
8. æ°å¼è½¬æ¢ä¸ºæ°ä¸²ã è¿ç¨ Str(x,s) ææ°å¼xå为æ°ä¸²s.
ä¾ï¼str(12345,s); ç»æs=â12345â
9. æ°ä¸²è½¬æ¢ä¸ºæ°å¼ã è¿ç¨val(s,x,I) ææ°ä¸²s转å为æ°å¼x,å¦ææååI=0,ä¸æååI为æ æå符çåºæ°
ä¾ï¼val(â1234â,x,I);ç»æ x:=1234
[ç¼è¾æ¬æ®µ]ä¸ãæ åå½æ°
æ åå½æ°ãTurbo Pascalè¯è¨æä¾äºèªåé为æ´åéçæ åå½æ°æ顺åºå½æ°ç®æ¯å½æ°å转æ¢å½æ°çã
æ åå½æ°æ¯Turbo Pascalè¯è¨é¢å
å®ä¹çï¼å®ä»¬å®é
ä¸æ¯è½å®æç¹å®åè½ç称æ¥åç¨åºçç¨åºæ®µãæ¯ä¸ªæ åå½æ°é½ç¨ä¸ä¸ªæ è¯ç¬¦æ¥æ è¯ï¼æ¯ä¸ªæ åå½æ°é½è½å®æä¸ä¸ªç¹å®çåè½ï¼å¨ç¨åºä¸å¯ä»¥ç´æ¥è°ç¨å®ä»¬ãTurbo Pascalè¯è¨ä¸æäºæ åå½æ°ä¸æ°å¦ä¸çå½æ°æç¸ä¼¼ä¹å¤ã
ä¸ãæ´æ°ç±»åå½æ°
æ´åæ¯é¡ºåºç±»åï¼å³ææçæ´åæ°é½æ¯æä¸å®ç顺åºæåçãå¦3çååºæ°æ¯4ï¼350çååºæ°æ¯351ã以åä»ç»çå¸å°åãå符åãæ举类åååçç±»åçé½æ¯é¡ºåºç±»åã顺åºå½æ°å¯ä»¥å¯¹é¡ºåºç±»åæ°æ®è¿è¡æä½ï¼ä½è¦æ³¨æå®ä»¬èªåéçåå¼èå´ã
â åè¶å½æ°ï¼Pred(x)å½æ°å¼ä¸ºx-lï¼ä¾å¦ï¼
Pred (6)=5 Pred (-21)=-22
â¡å继å½æ°ï¼Succ (x)å½æ°å¼ä¸ºx+lï¼ä¾å¦ï¼
Succ (l5)=16 Succ (-114)= -113
â¢ç»å¯¹å¼å½æ°ï¼Abs (x)å½æ°å¼ä¸ºï½Xï½ï¼ä¾å¦ï¼
Abs (-119)=119 Abs (101)=101
â£å¹³æ¹å½æ°ï¼Sqr (x)å½æ°å¼ä¸ºX2ï¼ä¾å¦ï¼
Sqr (-5)=ï¼25 Sqr (l0)= 100
以ä¸å个å½æ°çç»æä»æ¯æ´åæ°ã
â¤å¥å½æ°ï¼Odd (x)ï¼å½æ°çç»æ为å¸å°åãå½X为å¥æ°æ¶ï¼å½æ°å¼ä¸ºtrueï¼å½X为å¶æ°æ¶ï¼å½æ°å¼ä¸ºfalseãä¾å¦ï¼
Odd (13)= True Odd (16)= False
â¥å符å½æ°ï¼Chr (X)ï¼å½æ°å¼æ¯åºå·çASCIIå符ï¼å±å符åãä¾å¦ï¼
Chr (65)=âAâ Chr (32)=â â
äºãå®æ°ç±»åå½æ°
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¶ä»ç®æ¯å½æ°çç»æç±»åé½æ¯å®åã
ç»å¯¹å¼å½æ°Abs(x)ï¼å½æ°å¼ä¸ºxçç»å¯¹å¼
å¹³æ¹å½æ°Sqr (x)ï¼å½æ°å¼ä¸ºxçå¹³æ¹
å°æ°å½æ°Frac (x)ï¼å½æ°å¼ä¸ºxçå°æ°é¨å
æ´æ°å½æ°Int (x)ï¼å½æ°å¼ä¸ºxçæ´æ°é¨å
æ£å¼¦å½æ°Sin (x)ï¼å½æ°å¼ä¸ºxçæ£å¼¦ï¼å
¶ç³ï¼çåä½ä¸ºå¼§åº¦
ä½å¼¦å½æ°Cos (x)ï¼å½æ°å¼ä¸ºxçä½å¼¦ï¼å
¶ä¸ï¼çåä½ä¸ºå¼§åº¦
ææ°å½æ°Exp (x)ï¼å½æ°å¼ä¸ºäºex
对æ°å½æ°Ln (X)ï¼å½æ°å¼ä¸ºxçèªç¶å¯¹æ°
å¹³æ¹æ£æ ¹æ ¹å½æ°çSqrt (x)ï¼å½æ°å¼ä¸ºxçå¹³æ¹æ£æ ¹
åæ£åå½æ°Arctan(x)ï¼å½æ°å¼ä¸ºxçåæ£åï¼åä½ä¸ºå¼§åº¦
éæºå½æ°Randomï¼æ èªåéæ¶ï¼å½æ°å¼å(0,1)é´çéæºå°æ°ï¼æèªåéä¸ä¸ºWordç±»åæ¶ï¼å½æ°å¼å(0ï¼èªåé)é´çéæºæ´æ°ã
ä¸ãå符类åå½æ°Turbo Pascalè¯è¨æä¾å¦ä¸èªåé为å符åçæ åå½æ°ï¼å
¶ä¸Chr为å符åã
å继å½æ°Succ (ch)ï¼ä¾å¦ï¼Succ (â8â)=â9â Succ (âEâ)=âFâ
对å符éçæåä¸ä¸ªå符ï¼Succå½æ°æ æä¹ã
åè¶å½æ°Pred (ch)ï¼ä¾å¦ï¼Pred (â7â)=â6â Pred (âBâ)=â Aâ
åºæ°å½æ°Ord (ch)ï¼:ç»åºå符chå¨ASCIIå符éä¸çåºå·ï¼ç»æ为æ´åã
注æï¼Ord (â7â)<>7ï¼æ£ç¡®çæ¯ï¼Ord (â7â)=Ord(â0â)+7=48+7=55
è¥chæ¯æ°åå符ï¼åOrd (ch)-Ord ('0')æ¯è¯¥æ°åå符çæ°å¼ãä¾å¦ï¼Ord (â7â)-Ord(â0â)=7
åé¢ä»ç»çå符å½æ°Chr (i)æ¯Ord (ch)çéå½æ°ãä¾å¦:
Chr (55)= â7â Chr (Ord(âAâ))=âAâ
ä¸ãå¸å°ç±»åå½æ°
Turbo Pascalè¯è¨æä¾å¸å°åå½æ°ä¸»è¦æ¯å 个å符åå½æ°ã
Ord (B) ä¾å¦ï¼Ord (false)=0 Ord (true)=1
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