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Text File  |  1994-03-01  |  332b  |  9 lines
  1. 5 ONERRORGOTO100
  2. 20 MODE8:DIM:r=0:c$=CHR$(5)
  3. 30 CLS:PRINT"ãrý       r:radius";
  4. 50 LOCATE0,1:PRINTc$;"r=";r;"?";:INPUT@42;r:LOCATE0,0:IFr<0 THEN50
  5. 70 LOCATE0,1:PRINTc$;"Area =";PI*r*r;:z$=INPUT$(1,@):GOTO50
  6. 100 IFERR=1 THENCLS:ONERRORGOTO0
  7. 110 IFERL=50 THENRESUME50
  8. 120 LOCATE0,1:PRINTc$;"not found";:z$=INPUT$(1,@):RESUME30
  9.