\START\
\COMMENT=Program file dated 06/28/93, 16:37
\NAME=TRAPI
\FILE=TRAPI.85P
Func:FnOff 
ClLCD
Radian
Disp "ENTER FUNCTION"
InpST "Y=",Y
\St>Eq\(Y,y1)
Lbl AA
Disp "LOWER LIMIT OF X"
Prompt XL
Disp "UPPER LIMIT OF X"
Prompt XU
Disp "# INTERVALS"
Prompt N
0\->\SM
(XU-XL)/N\->\W
XL\->\xMin
XU\->\xMax
XL\->\X
ClLCD
Disp "SCALING GRAPH"
Disp "PLEASE WAIT"
ZFit
If yMin>0
0\->\yMin
If yMax<0
0\->\yMax
DispG
For(I,1,N)
evalF(y1,x,X)\->\YX
evalF(y1,x,X+W)\->\YW
(YX+YW)/2\->\AV
SM+AV*W\->\SM

Line(X,0,X,YX)
Line(X,YX,X+W,YW)
Line(X+W,YW,X+W,0)
X+W\->\X
End
Pause 
ClLCD
Disp "INTEGRAL ="
Disp SM
Disp "RUN AGAIN ?"
Disp "YES  1"
Disp "NO   2"
Input R
If R==1
Goto AA
Stop
\STOP\