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Text File  |  1994-03-01  |  444b  |  11 lines
  1. 5 ONERRORGOTO500
  2. 10 MODE8:DIM:ERASEa:DIMa(3):a$="a b x1y1":c$=CHR$(5)
  3. 20 CLS:PRINT"Distance - y=ax+b,(x1,y1)";
  4. 30 FORi=0 TO3
  5. 40 LOCATE0,1:PRINTc$;MID$(a$,1+i*2,(SGN(i-1.5)+1)/2+1);"=";a(i);"?";:INPUT@42;a(i):LOCATE0,0
  6. 50 NEXT
  7. 60 LOCATE0,1:PRINTc$;"d =";ABS(a(0)*a(2)-a(3)+a(1))/SQR(a(0)^2+1);:w$=INPUT$(1,@):GOTO30
  8. 500 IFERR=1 THENCLS:ONERRORGOTO0
  9. 510 IFERL=40 THENRESUME40
  10. 520 LOCATE0,1:PRINTc$;"not found";:w$=INPUT$(1,@):RESUME20
  11.