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.
15 lines
408 B
QBasic
15 lines
408 B
QBasic
10 REM Bubble sort with string comparison
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20 DIM A$(9)
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30 DATA "banana","apple","cherry","date","elderberry"
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40 DATA "fig","grape","honeydew","kiwi","lemon"
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50 FOR I = 0 TO 9 : READ A$(I) : NEXT I
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60 REM Sort
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70 FOR I = 0 TO 8
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80 FOR J = 0 TO 8 - I
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90 IF A$(J) > A$(J+1) THEN SWAP A$(J), A$(J+1)
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100 NEXT J
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110 NEXT I
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120 REM Print sorted
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130 FOR I = 0 TO 9 : PRINT A$(I) : NEXT I
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140 PRINT "Bubble sort OK"
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