1f4c460f4f
Add GitHub Actions CI with automated build and test. Implement real terminal I/O with raw mode (enable_raw/disable_raw, proper INKEY$ polling via VMIN=0/VTIME=0, INPUT$ function). Add Sixel graphics engine with virtual framebuffer (SCREEN 1: 320x200, SCREEN 2: 640x200), Bresenham line drawing, midpoint circle, flood fill PAINT, DRAW mini-language parser, and Sixel encoder with RLE. Replace all graphics stubs with real implementations (PSET, LINE, CIRCLE, DRAW, PAINT, COLOR, SCREEN, POINT). Fix AND/OR/XOR operator precedence to be lower than relational operators. Add 13 classic test programs (39 total). Bump version to 0.5.0.
10 lines
195 B
QBasic
10 lines
195 B
QBasic
10 REM Fibonacci sequence - double precision
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20 A# = 0 : B# = 1
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30 FOR I = 1 TO 20
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40 PRINT USING "##. ##########"; I; A#
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50 C# = A# + B#
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60 A# = B#
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70 B# = C#
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80 NEXT I
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90 PRINT "Fibonacci OK"
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