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发表于 2012-10-2 20:51:56
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给你一段画函数图像的程序- 1 " "GOTO 10
- 2 Y=0:REM ----+----+----+----+----+----+----+----+----+----+----+----+----+----+--
- 3 RETURN
- 10 LOCK :CLEAR :DIM A$(1)*73:ON ERROR GOTO 500
- 11 CLS :PAUSE " PLANAR CARTESIAN PLOTTER":PAUSE " Copr. 1982 Tandy Corp."
- 20 "C"CLS :WAIT 0:PRINT " Fn Plt Dsp End"
- 21 Z=ASC INKEY$ -16:IF Z<1OR Z>4THEN 21
- 22 CLS :GOTO 100*Z
- 100 M=STATUS 2-STATUS 1+16:INPUT "F(X)=";A$(0):CLS :A$(1)=A$(0)
- 110 RESTORE 901:IF A$(0)=""POKE M,58,&F1,&AB:GOTO 20
- 120 Z=ASC A$(0):IF Z<65OR Z>84THEN 160
- 130 FOR I=1TO 17:READ T$,Z:IF LEFT$ (A$(0),LEN T$)<>T$NEXT I:GOTO 160
- 140 I=17:NEXT I:POKE M,&F1,Z:M=M+2
- 150 PRINT T$;:G=LEN A$(0):H=LEN T$:A$(0)=RIGHT$ (A$(0),G-H):GOTO 110
- 160 Z=ASC A$(0):IF Z>32POKE M,Z:M=M+1
- 170 T$=CHR$ Z:GOTO 150
- 200 RESTORE 900:FOR I=1TO 6:READ P$:CLS :PRINT P$;" =";@(I);:INPUT "? ";@(I)
- 201 NEXT I:CLS
- 202 IF E>0AND E<101AND E=INT ETHEN 210
- 203 CLS :INPUT "Reenter step, 1-100 ";E
- 204 GOTO 202
- 210 GRAPH :GLCURSOR (0,-250):SORGN
- 211 LINE (0,0)-(216,200),,,B
- 212 FOR Y=0TO 195STEP 195:FOR Z=22TO 194STEP 22:LINE (Z,Y)-(Z,Y+5):NEXT Z:NEXT Y
- 213 FOR Y=0TO 211STEP 211:FOR Z=20TO 180STEP 20:LINE (Y,Z)-(Y+5,Z):NEXT Z:NEXT Y
- 220 FOR I=0TO 100STEP E:X=A+.01*I*(B-A):GOSUB 250:IF ILINE (K,L)-(M,N),0
- 221 K=M:L=N:NEXT I
- 230 GLCURSOR (0,-30):TEXT :CSIZE 1:LPRINT "F(X)=";A$(1):LF 1:RESTORE 900:FOR I=1TO 6:READ P$:LPRINT P$;" =";@(I)
- 231 NEXT I:LF 7:GOTO 20
- 250 GOSUB 2
- 251 IF Y<CLET Y=C
- 252 IF Y>DLET Y=D
- 253 M=216*(X-A)/(B-A)
- 254 N=200*(Y-C)/(D-C)
- 255 RETURN
- 300 WAIT :PRINT "F(X)=";A$(1):WAIT 0:GOTO 20
- 400 UNLOCK :END
- 500 V=STATUS 4:W=PEEK &789B:IF V=2BEEP 1:Y=E:GOTO 251
- 510 WAIT :PRINT "ERROR";W;" in";V:GOTO 20
- 900 DATA "XL","XH","YL","YH","Step %","F(error)"
- 901 DATA "SQR",&6B,"SIN",&7D,"COS",&7E,"TAN",&7F,"LN",&76,"LOG",&77,"EXP",&78
- 902 DATA "PI",&5D,"ABS",&70,"ASN",&73,"ACS",&74,"ATN",&75,"INT",&71,"SGN",&79
- 903 DATA "OR",&51,"AND",&50,"NOT",&6D
- 999 END
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