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Text File  |  1994-03-01  |  431b  |  11 lines
  1. 5 ONERRORGOTO900
  2. 20 MODE8:DIM:r=0:h=0:c$=CHR$(5)
  3. 30 CLS:PRINT"2ãrh+2ãrý    r:radius  h:height";
  4. 40 s$="r":z=r:GOSUB500:r=z
  5. 50 s$="h":z=h:GOSUB500:h=z
  6. 70 LOCATE0,1:PRINTc$;"Surface =";2*PI*r*(r+h);:z$=INPUT$(1,@):GOTO40
  7. 500 LOCATE0,1:PRINTc$;s$;"=";z;"?";:INPUT@42;z:LOCATE0,0:IFz<0 THEN500 ELSERETURN
  8. 900 IFERR=1 THENCLS:ONERRORGOTO0
  9. 910 IFERL=500 THENRESUME500
  10. 920 LOCATE0,1:PRINTc$;"not found";:z$=INPUT$(1,@):RESUME30
  11.