RosettaCodeData/Task/Polynomial-long-division/BBC-BASIC/polynomial-long-division.basic

45 lines
1.1 KiB
Plaintext

DIM N%(3) : N%() = -42, 0, -12, 1
DIM D%(3) : D%() = -3, 1, 0, 0
DIM q%(3), r%(3)
PROC_poly_long_div(N%(), D%(), q%(), r%())
PRINT "Quotient = "; FNcoeff(q%(2)) "x^2" FNcoeff(q%(1)) "x" FNcoeff(q%(0))
PRINT "Remainder = " ; r%(0)
END
DEF PROC_poly_long_div(N%(), D%(), q%(), r%())
LOCAL d%(), i%, s%
DIM d%(DIM(N%(),1))
s% = FNdegree(N%()) - FNdegree(D%())
IF s% >= 0 THEN
q%() = 0
WHILE s% >= 0
FOR i% = 0 TO DIM(d%(),1) - s%
d%(i%+s%) = D%(i%)
NEXT
q%(s%) = N%(FNdegree(N%())) DIV d%(FNdegree(d%()))
d%() = d%() * q%(s%)
N%() -= d%()
s% = FNdegree(N%()) - FNdegree(D%())
ENDWHILE
r%() = N%()
ELSE
q%() = 0
r%() = N%()
ENDIF
ENDPROC
DEF FNdegree(a%())
LOCAL i%
i% = DIM(a%(),1)
WHILE a%(i%)=0
i% -= 1
IF i%<0 EXIT WHILE
ENDWHILE
= i%
DEF FNcoeff(n%)
IF n%=0 THEN = ""
IF n%<0 THEN = " - " + STR$(-n%)
IF n%=1 THEN = " + "
= " + " + STR$(n%)