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Text File  |  1994-03-01  |  457b  |  12 lines
  1. 5 ONERRORGOTO900
  2. 20 MODE8:DIM:a=0:b=0:h=0:c$=CHR$(5)
  3. 30 CLS:PRINT"(a+b)h/2     a:b:base  h:height";
  4. 40 s$="a":z=a:GOSUB100:a=z
  5. 50 s$="b":z=b:GOSUB100:b=z
  6. 60 s$="h":z=h:GOSUB100:h=z
  7. 70 LOCATE0,1:PRINTc$;"Area =";(a+b)*h/2;:z$=INPUT$(1,@):GOTO40
  8. 100 LOCATE0,1:PRINTc$;s$;"=";z;"?";:INPUT@42;z:LOCATE0,0:IFz<0 THEN100 ELSERETURN
  9. 900 IFERR=1 THENCLS:ONERRORGOTO0
  10. 910 IFERL=100 THENRESUME100
  11. 920 LOCATE0,1:PRINTc$;"not found";:z$=INPUT$(1,@):RESUME30
  12.