c2d73e9c24
Add OPEN/CLOSE with both modern (OPEN "f" FOR OUTPUT AS #n) and compact (OPEN "O",#n,"f") syntaxes. PRINT#, WRITE#, INPUT#, LINE INPUT# for sequential file access. EOF() now returns real file status with peek-ahead. LOC/LOF return approximate values. PRINT USING with numeric (#, ., +, -, $$, **, ^^^^, comma grouping) and string (!, &, \ \) format specifiers. Shared by PRINT USING and PRINT# USING. SAVE (ASCII), LOAD (with ,R auto-run), and MERGE for program persistence. MID$ assignment (MID$(var$, start [,len]) = expr) for in-place string modification. Works with both scalar variables and array elements. Graphics stubs for SCREEN, PSET, PRESET, LINE, CIRCLE, DRAW, PAINT, VIEW, WINDOW, PALETTE - parse and discard arguments so graphics-heavy programs don't crash. SYSTEM and NEW/CLEAR now close all open files. Version bumped to 0.3.0. 22 tests pass (16 existing + 6 new).
8 lines
132 B
QBasic
8 lines
132 B
QBasic
10 REM MID$ assignment test
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20 A$="HELLO WORLD"
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30 MID$(A$,7,5)="BASIC"
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40 PRINT A$
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50 B$="ABCDEF"
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60 MID$(B$,1,2)="XY"
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70 PRINT B$
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