GWBASIC User's Manual

More documents

Recommendations

Info

GW-BASIC <strong>User's</strong> Guide Appendix E Converting BASIC Programs to GW-BASIC Programs written in a BASIC language other than GW-BASIC may require some minor adjustments before they can be run. The following sections describe these adjustments. E.1 String Dimensions Delete all statements used to declare the length of strings. A statement such as the following: DIM A$(I,J) which dimensions a string array for J elements of length I, should be converted to the following statement: DIM A$(J) Some GW-BASIC languages use a comma or ampersand (&) for string concatenation. Each of these must be changed to a plus sign (+), which is the operator for GW-BASIC string concatenation. In GW-BASIC, the MID$, RIGHT$, and LEFT$ functions are used to take substrings of strings. Forms such as A$(I) to access the Ith character in A$, or A$(I,J) to take a substring of A$ from position I to position J, must be changed as follows: Other BASICGW-BASIC X$=A$(I) X$=MID$(A$,I,1) X$=A$(I,J) X$=MID$(A$,I,J-I+1) If the substring reference is on the left side of an assignment, and X$ is used to replace characters in A$, convert as follows: Other BASICGW-BASIC A$(I)=X$ MID$(A$,I,1)=X$ A$(I,J)=X$ MID$(A$,I,J-I+1)=X$ E.2 Multiple Assignments Some GW-BASIC languages allow statements of the following form to set B and C equal to zero: 10 LET B=C=0 GW-BASIC would interpret the second equal sign as a logical operator and set B equal to -1 if C equaled 0. Convert this statement to two assignment statements: 10 C=0: B=0 file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/Appendix%20E.html (1 of 2)28/03/2004 21.29.06
GW-BASIC <strong>User's</strong> Guide E.3 Multiple Statements Some GW-BASIC languages use a backslash (\) to separate multiple statements on a line. With GW-BASIC, be sure all elements on a line are separated by a colon (:). E.4 MAT Functions Programs using the MAT functions available in some GW-BASIC languages must be rewritten using FOR-NEXT loops to execute properly. E.5 FOR-NEXT Loops Some GW-BASIC languages will always execute a FOR-NEXT loop once, regardless of the limits. GW-BASIC checks the limits first and does not execute the loop if past limits. file:///C|/Documents%20and%20Settings/Lorenzo/Desktop/GW%20Basic/Appendix%20E.html (2 of 2)28/03/2004 21.29.06
Page 1 and 2:
GWBASIC User's Manual User's Guide
Page 3 and 4:
GWBASIC User's Manual FILES Command
Page 5 and 6:
GWBASIC User's Manual PSET Statemen
Page 7 and 8:
GW-BASIC User's Guide Chapter 1 Wel
Page 9 and 10:
GW-BASIC User's Guide The Glossary
Page 11 and 12:
GW-BASIC User's Guide 2.2.2 Indirec
Page 13 and 14:
GW-BASIC User's Guide Sample GW-BAS
Page 15 and 16:
GW-BASIC User's Guide system assume
Page 17 and 18:
GW-BASIC User's Guide Note Reuse of
Page 19 and 20:
GW-BASIC User's Guide moves the cha
Page 21 and 22:
GW-BASIC User's Guide CTRL-G Causes
Page 23 and 24:
GW-BASIC User's Guide BASIC User's
Page 25 and 26:
GW-BASIC User's Guide Note ↵ (arr
Page 27 and 28:
GW-BASIC User's Guide Appendix H Ke
Page 29 and 30:
GW-BASIC User's Guide KEY(n) n is a
Page 31 and 32:
GW-BASIC User's Guide STRIG Trappin
Page 33 and 34:
GW-BASIC User's Guide KEY(n) Statem
Page 35 and 36:
GW-BASIC User's Guide LOC(x) Return
Page 37 and 38:
GW-BASIC User's Guide 15 KEY OFF:CL
Page 39 and 40:
GW-BASIC User's Guide and check the
Page 41 and 42:
GW-BASIC User's Guide Chapter 3 Rev
Page 43 and 44: GW-BASIC User's Guide until the RUN
Page 45 and 46: GW-BASIC User's Guide To save a fil
Page 47 and 48: GW-BASIC User's Guide Hexadecimal H
Page 49 and 50: GW-BASIC User's Guide The GW-BASIC
Page 51 and 52: GW-BASIC User's Guide The arithmeti
Page 53 and 54: GW-BASIC User's Guide Modulus arith
Page 55 and 56: GW-BASIC User's Guide EQV X Y X EQV
Page 57 and 58: GW-BASIC User's Guide RUN FILENAME
Page 59 and 60: GW-BASIC User's Guide OPTION BASE S
Page 61 and 62: GW-BASIC User's Guide LET Statement
Page 63 and 64: GW-BASIC User's Guide . . 400 R=1:
Page 65 and 66: GW-BASIC User's Guide ● Sequentia
Page 67 and 68: GW-BASIC User's Guide The program i
Page 69 and 70: GW-BASIC User's Guide PUT #1, CODE%
Page 71 and 72: GW-BASIC User's Guide number. Lines
Page 73 and 74: GW-BASIC User's Guide Appendix A Er
Page 75 and 76: GW-BASIC User's Guide 18 Undefined
Page 77 and 78: GW-BASIC User's Guide 59-60Unprinta
Page 79 and 80: GW-BASIC User's Guide 75 Path/File
Page 81 and 82: GW-BASIC User's Guide Appendix C AS
Page 83 and 84: GW-BASIC User's Guide Appendix D As
Page 85 and 86: GW-BASIC User's Guide moved the cur
Page 87 and 88: GW-BASIC User's Guide that the code
Page 89 and 90: GW-BASIC User's Guide converted to
Page 91 and 92: GW-BASIC User's Guide DEF USR State
Page 93: GW-BASIC User's Guide USR Function
Page 97 and 98: GW-BASIC User's Guide 8 8 18 24 90
Page 99 and 100: GW-BASIC User's Guide _ Underscore.
Page 101 and 102: GW-BASIC User's Guide Data represen
Page 103 and 104: GW-BASIC User's Guide binary system
Page 105 and 106: GW-BASIC User's Guide computers or
Page 107 and 108: GW-BASIC User's Guide double-precis
Page 109 and 110: GW-BASIC User's Guide graphics A ha
Page 111 and 112: GW-BASIC User's Guide precisely ref
Page 113 and 114: GW-BASIC User's Guide An extra-bit
Page 115 and 116: GW-BASIC User's Guide single-densit
Page 117 and 118: GW-BASIC User's Guide ABS Function
Page 119 and 120: GW-BASIC User's Guide CHR$ Function
Page 121 and 122: GW-BASIC User's Guide AUTO Command
Page 123 and 124: GW-BASIC User's Guide BLOAD Command
Page 125 and 126: GW-BASIC User's Guide BSAVE Command
Page 127 and 128: GW-BASIC User's Guide Note ● Valu
Page 129 and 130: GW-BASIC User's Guide CDBL Function
Page 131 and 132: GW-BASIC User's Guide INT Function
Page 133 and 134: GW-BASIC User's Guide CHAIN Stateme
Page 135 and 136: GW-BASIC User's Guide MERGE Command
Page 137 and 138: GW-BASIC User's Guide CIRCLE Statem
Page 139 and 140: GW-BASIC User's Guide COLOR Stateme
Page 141 and 142: GW-BASIC User's Guide For more info
Page 143 and 144: GW-BASIC User's Guide EGA with Enha
Page 145 and 146:
GW-BASIC User's Guide SCREEN 10 ●
Page 147 and 148:
GW-BASIC User's Guide For various s
Page 149 and 150:
GW-BASIC User's Guide PALETTE, PALE
Page 151 and 152:
GW-BASIC User's Guide Enhanced d EG
Page 153 and 154:
GW-BASIC User's Guide N Move, but r
Page 155 and 156:
GW-BASIC User's Guide LINE Statemen
Page 157 and 158:
GW-BASIC User's Guide LINE (0,0)-(1
Page 159 and 160:
GW-BASIC User's Guide tile_length i
Page 161 and 162:
GW-BASIC User's Guide PRESET and PS
Page 163 and 164:
GW-BASIC User's Guide CLEAR Command
Page 165 and 166:
GW-BASIC User's Guide CLOSE Stateme
Page 167 and 168:
GW-BASIC User's Guide COM(n) Statem
Page 169 and 170:
GW-BASIC User's Guide CONT Command
Page 171 and 172:
GW-BASIC User's Guide CSRLIN Variab
Page 173 and 174:
GW-BASIC User's Guide CVI, CVS, CVD
Page 175 and 176:
GW-BASIC User's Guide DATA Statemen
Page 177 and 178:
GW-BASIC User's Guide RESTORE State
Page 179 and 180:
GW-BASIC User's Guide the value of
Page 181 and 182:
GW-BASIC User's Guide DEFINT/SNG/DB
Page 183 and 184:
GW-BASIC User's Guide DEF and SEG m
Page 185 and 186:
GW-BASIC User's Guide POKE Statemen
Page 187 and 188:
GW-BASIC User's Guide EDIT Command
Page 189 and 190:
GW-BASIC User's Guide ENVIRON State
Page 191 and 192:
GW-BASIC User's Guide ENVIRON$ Func
Page 193 and 194:
GW-BASIC User's Guide SHELL Stateme
Page 195 and 196:
GW-BASIC User's Guide EOF Function
Page 197 and 198:
GW-BASIC User's Guide ERDEV and ERD
Page 199 and 200:
GW-BASIC User's Guide ERROR Stateme
Page 201 and 202:
GW-BASIC User's Guide EXP Function
Page 203 and 204:
GW-BASIC User's Guide FIELD Stateme
Page 205 and 206:
GW-BASIC User's Guide GET Statement
Page 207 and 208:
GW-BASIC User's Guide FOR ... NEXT
Page 209 and 210:
GW-BASIC User's Guide FRE Function
Page 211 and 212:
GW-BASIC User's Guide The number of
Page 213 and 214:
GW-BASIC User's Guide GOTO Statemen
Page 215 and 216:
GW-BASIC User's Guide OCT$ Function
Page 217 and 218:
GW-BASIC User's Guide Testing Equal
Page 219 and 220:
GW-BASIC User's Guide 1070 TIMEOUT%
Page 221 and 222:
GW-BASIC User's Guide INPUT Stateme
Page 223 and 224:
GW-BASIC User's Guide PRINT Stateme
Page 225 and 226:
GW-BASIC User's Guide STRING$ Funct
Page 227 and 228:
GW-BASIC User's Guide PRINT USING S
Page 229 and 230:
GW-BASIC User's Guide ** A double a
Page 231 and 232:
GW-BASIC User's Guide WIDTH Stateme
Page 233 and 234:
GW-BASIC User's Guide INPUT# Statem
Page 235 and 236:
GW-BASIC User's Guide 100 PRINT "TY
Page 237 and 238:
GW-BASIC User's Guide IOCTL Stateme
Page 239 and 240:
GW-BASIC User's Guide KILL Command
Page 241 and 242:
GW-BASIC User's Guide MID$ Function
Page 243 and 244:
GW-BASIC User's Guide LEN FUNCTION
Page 245 and 246:
GW-BASIC User's Guide LINE INPUT# S
Page 247 and 248:
GW-BASIC User's Guide LLIST Command
Page 249 and 250:
GW-BASIC User's Guide LOC Function
Page 251 and 252:
GW-BASIC User's Guide Makes the cur
Page 253 and 254:
GW-BASIC User's Guide It is expecte
Page 255 and 256:
GW-BASIC User's Guide LOG Function
Page 257 and 258:
GW-BASIC User's Guide MID$ Statemen
Page 259 and 260:
GW-BASIC User's Guide NAME Command
Page 261 and 262:
GW-BASIC User's Guide ON ERROR GOTO
Page 263 and 264:
GW-BASIC User's Guide ON ... GOSUB
Page 265 and 266:
GW-BASIC User's Guide reclen is an
Page 267 and 268:
GW-BASIC User's Guide ● Files may
Page 269 and 270:
GW-BASIC User's Guide RESET Command
Page 271 and 272:
GW-BASIC User's Guide Examples: The
Page 273 and 274:
GW-BASIC User's Guide when using GE
Page 275 and 276:
GW-BASIC User's Guide PCOPY Command
Page 277 and 278:
GW-BASIC User's Guide n = 5 Returns
Page 279 and 280:
GW-BASIC User's Guide . (period) A
Page 281 and 282:
GW-BASIC User's Guide PMAP Function
Page 283 and 284:
GW-BASIC User's Guide The following
Page 285 and 286:
GW-BASIC User's Guide If the string
Page 287 and 288:
GW-BASIC User's Guide PUT Statement
Page 289 and 290:
GW-BASIC User's Guide RANDOMIZE Sta
Page 291 and 292:
GW-BASIC User's Guide RND Function
Page 293 and 294:
GW-BASIC User's Guide . . . 129 FOR
Page 295 and 296:
GW-BASIC User's Guide RESUME Statem
Page 297 and 298:
GW-BASIC User's Guide RMDIR Command
Page 299 and 300:
GW-BASIC User's Guide SAVE Command
Page 301 and 302:
GW-BASIC User's Guide SGN Function
Page 303 and 304:
GW-BASIC User's Guide SOUND Stateme
Page 305 and 306:
GW-BASIC User's Guide SPACE$ Functi
Page 307 and 308:
GW-BASIC User's Guide SQR Function
Page 309 and 310:
GW-BASIC User's Guide STOP Statemen
Page 311 and 312:
GW-BASIC User's Guide VAL Function
Page 313 and 314:
GW-BASIC User's Guide STRIG(n) Stat
Page 315 and 316:
GW-BASIC User's Guide SYSTEM Comman
Page 317 and 318:
GW-BASIC User's Guide TAN Function
Page 319 and 320:
GW-BASIC User's Guide 08:00:05 The
Page 321 and 322:
GW-BASIC User's Guide TRON/TROFF Co
Page 323 and 324:
GW-BASIC User's Guide 0 1 Mode The
Page 325 and 326:
GW-BASIC User's Guide VARPTR$ Funct
Page 327 and 328:
GW-BASIC User's Guide The following
Page 329 and 330:
GW-BASIC User's Guide WAIT Statemen
Page 331 and 332:
GW-BASIC User's Guide WINDOW Statem
Page 333 and 334:
GW-BASIC User's Guide WRITE Stateme
show all

GWBASIC User's Manual

Create successful ePaper yourself

Delete template?

Save as template?