This is intended to be the human readable version of the source code for Between Curves Tools. This version is intended to work only on the TI-82 Texas Instruments graphic calculator. Also available: Documentation about "Between Curves Tools" and versions of the program for other calculators and in other formats.
Any line that begins with a backslash is a comment and should not be entered into the calculator. (Comments have been colored green) For an authoritative copy of this program's source code that can be imported to the calculator via a computer, consult the text version of Between Curves Tools source code for the TI-82, along with the character reference. The special character reference also gives an overview of all non-ASCII characters for the calculator, and shows the menus in which they can be found.
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\START82\ \COMMENT=Program file dated 04/10/96, 18:39 \NAME=BTWNCURV :ClrHome :Menu("EXPS IN Y1+Y2?","YES",2,"NO",1) :Lbl 1 :Disp "EXPRESSION OF","TOP CURVE" :Input "IN QUOTES:",Y1 :Disp "EXPRESSION OF","BOTTOM CURVE" :Input "IN QUOTES:",Y2 :Lbl 2 :FnOff :FnOn 1,2 :Input "LOWER BOUND:",A :Input "UPPER BOUND:",B :If A≥B :Goto 2 :(B-A)/94→C :A-C→Xmin :B+C→Xmax :4.7C→Xscl :Y2(fMin(Y2,X,A,B))→D :Y1(fMax(Y1,X,A,B))→E :(E-D)/64→F :D-8F→Ymin :E+F→Ymax :3.2F→Yscl :A→G :Lbl 3 :Y1(G)→H :Y2(G)→I :If H<I :Then :Disp "Y1 IS NOT","ALWAYS > Y2" :Stop :End :G+4C→G :If G≤B :Goto 3 :Menu("DO YOU WANT...","AREA",4,"VOL CIRC REV",5,"CENTROID",8) :Lbl 4 :fnInt(Y1-Y2,X,A,B)→G :Shade(Y2,Y1,1,A,B) :Text(57,0,"AREA=",G) :Stop :Lbl 5 :Menu("REVOLVE AROUND","HOR LINE Y=",6,"VERT LINE X=",7) :Lbl 6 :Input "LINE: Y=?",H :If H>D and H<E :Then :Disp "CANNOT BE","REVOLVED AROUND","THAT LINE" :Stop :End :If H≥E :H→E :If H≤D :H→D :(E-D)/64→F :D-8F→Ymin :E+F→Ymax :3.2F→Yscl :abs (π*fnInt((Y1-H)²-(Y2-H)²,X,A,B))→G :Horizontal H :Shade(Y2,Y1,1,A,B) :Text(57,0,"VOL CIRC REV=",G) :Stop :Lbl 7 :Input "LINE: X=?",H :If H>A and H<B :Then :Disp "CANNOT BE","REVOLVED AROUND","THIS LINE" :Stop :End :A→Xmin :B→Xmax :If H≤A :H→Xmin :If H≥B :H→Xmax :(Xmax-Xmin)/94→C :Xmin-C→Xmin :Xmax+C→Xmax :4.7C→Xscl :2πfnInt((abs (H-X))(Y1-Y2),X,A,B)→G :Vertical H :Shade(Y2,Y1,1,A,B) :Text(57,0,"VOL CIRC REV=",G) :Stop :Lbl 8 :fnInt(Y1-Y2,X,A,B)→G :fnInt(X(Y1-Y2),X,A,B)/G→H :fnInt(((Y1+Y2)/2)(Y1-Y2),X,A,B)/G→I :Shade(Y2,Y1,1,A,B) :Pt-Change(H,I) :Pt-Change(H+ΔX,I) :Pt-Change(H-ΔX,I) :Pt-Change(H,I+ΔY) :Pt-Change(H,I-ΔY) :Text(57,0,"X=",H) :Text(57,49,"Y=",I) :Stop :COPYRIGHT STEPHEN OSTERMILLER APRIL 1996 \STOP82\ |