  1. Senior Member
Join Date
Jun 2009
Posts
200

## Speaking of spaghetti code... " Just kidding - BASIC limits choice in this regard.

Although it can be done...  Reply With Quote

2. Member
Join Date
Jan 2018
Posts
34

## Conversions, 1-4-19

I thought it would be nice to have a package of my own frequently used conversions. The layout 'mi>km', miles to kilometers, made sense to me. The number 1.6093 multiplied by miles should yield kilometers. Enter your own conversions and multiplier beginning at 7000 in the DATA statements. I included some conversions I frequently use. Use multipliers with more digits for more accurate results.

For conversions using a formula like 'f>c', fahrenheit to celsius, enter the conversion then a -1 for the number multiplier. This will send the program to the 7900s where you can work the equation. Follow the programming example that's there. Keep all conversions with a number multiplier between 7000 and 7399 (above the -1s).

The 'ans' variable on the display will contain the answer. You can use it to seed another input. If you type the program in, make sure it's all working properly. On line 7490 make sure you type 'end..,..' (end, two periods, comma, two periods).

Entering 'conv' for a conversion will list the conversions. Entering 'conv#' will list the conversions plus the conversion multiplier. Compare all conversions to known results before using.

(I'm no programmer but if you have the red sauce I have the code Code:
```7000 DATA mi>km,1.6093,km>mi,0.6214
7010 DATA yd>m,0.9144,m>yd,1.0936
7020 DATA ft>m,0.3048,m>ft,3.2808

7030 DATA in>mm,25.4,mm>in,0.03937
7040 DATA in>cm,2.54,cm>in,0.3937
7050 DATA in>m,0.0254,m>in,39.37

7060 DATA in2>mm2,645.16,mm2>in2,0.00155
7070 DATA in2>cm2,6.4516,cm2>in2,0.155
7080 DATA ft2>m2,0.0929,m2>ft2,10.764

7090 DATA in3>cm3,16.387,cm3>in3,0.06102
7100 DATA gal>ltr,3.7854,ltr>gal,0.26417
7110 DATA in3>gal,0.004329,gal>in3,231

7120 DATA in3>ltr,0.01639,ltr>in3,61.023
7130 DATA gal>cm3,3785.4,cm3>gal,0.000264
7140 DATA lbs>kgs,0.4536,kgs>lbs,2.2046

7150 DATA mph>ft/s,1.46667,ft/s>mph,0.6818166322

7400 REM only -1s below
7405 DATA f>c,-1,c>f,-1

7490 DATA end..,..

7500 PRINT "Conversion":PAUSE .8:A9\$="":B9=0:RESTORE 7000
7510 PRINT Z9\$;" conv ";:ACCEPT NULL(Z9\$),Z9\$
7512 IF Z9\$="conv"OR Z9\$="conv#"THEN C9=0:GOTO 7800
7518 PRINT C9;"num ";:ACCEPT NULL(C9),C9
7525 IF B9=-1THEN 7900
7530 IF A9\$=Z9\$THEN 7570
7550 GOTO 7520

7570 ANS=C9*B9
7580 PRINT "ans";C9;A9\$;" =";ANS:PAUSE:GOTO 7500

7800 RESTORE 7000
7810 READ A9\$,B9\$:IF Z9\$="conv"THEN PRINT A9\$:PAUSE
7815 IF Z9\$="conv#"THEN PRINT A9\$;"  ";B9\$:PAUSE
7820 IF A9\$="end.."THEN 7500 ELSE 7810
7830 GOTO 7500

7900 IF Z9\$="c>f"THEN ANS=(C9*(9/5))+32:A9\$=Z9\$:GOTO 7580
7910 IF Z9\$="f>c"THEN ANS=(C9-32)*(5/9):A9\$=Z9\$:GOTO 7580

7990 A9\$="end..":GOTO 7540```

Example:

conv lbs>kgs [enter]
0 num 210 [enter]
ans 210 lbs>kgs = 95.256

[enter]
lbs>kgs conv [enter]
210 num 300 [enter]
ans 300 lbs>kgs = 136.08

[enter]
lbs>kgs conv kgs>lbs [enter]
300 num 136.08 [enter]
ans 136.08 kgs>lbs = 300.001968  Reply With Quote

3. Member
Join Date
Jan 2018
Posts
34

## Wind Chill, 1-25-19

Sometimes the weather report doesn't give the wind chill. Sometimes my local weather conditions differ from the weather report. When it's really cold outside I like to know the wind chill. I went online and found math for wind chill and made this for the TI-74. It seems to yield similar results as weather forecasts. Check it out.

Code:
```600 PRINT "Wind Chill":PAUSE .6
610 PRINT TEMP;"temp,deg f ";:ACCEPT NULL(TEMP),TEMP
620 PRINT WSPED;"wind speed,mph ";:ACCEPT NULL(WSPED),WSPED
630 WCHIL=35.74+(.6215*TEMP)-(35.75*WSPED^.16)+(.4275*TEMP*WSPED^.16)
640 ANS=WCHIL:PRINT USING"ans wind chill,deg f=###.#";WCHIL:PAUSE:GOTO 600```

Example:

0 temp,deg f -5 [enter]
0 wind speed,mph 13 [enter]
ans wind chill,deg f=-24.5

-5 temp,deg f 13 [enter]
13 wind speed,mph 5 [enter]
ans wind chill,degf= 4.8  Reply With Quote

4. Junior Member
Join Date
Apr 2014
Posts
7

## A few years ago, I wrote a crappy program to calculate prime numbers. Every once in a while, at social gatherings, I'd pull out the TI-74 and announce that whatever number on the screen is a prime number.  Reply With Quote

5. Member
Join Date
Jan 2018
Posts
34

## Simpson's Rule, 3-2-19

I found this website that calculated the volume of an American football with a definite integral.

https://www.math.ucdavis.edu/~morris/16B/sec5.7.pdf

As I've said before, I'm no programmer and I'm poor at math. But I wanted to see if I could work a definite integral on my TI-74. I found Simpson's Rule which is supposed to work a definite integral. I programmed Simpson's Rule on my 74. I put the definite integral on line 8100. It seems to work okay....at least it gave the results of their football example.

Code:
```8000 PRINT "Simpson's Rule":PAUSE 1:Z=0:V=1:Y=0
8005 PRINT "Def.Integral..line 8100":PAUSE 1
8010 PRINT A;"start ";:ACCEPT NULL(A),A
8020 PRINT B;"end ";:ACCEPT NULL(B),B
8030 PRINT C;"step ";:ACCEPT NULL(C),C
8040 D=(B-A)/C:X=A-D
8045 IF (C/2)-INT(C/2)>0 THEN PRINT "..step even #s only":PAUSE :GOTO 8030
8050 X=X+D:IF X>B THEN 8130
8060 IF X=B THEN V=1
8070 IF V=1 THEN 8100
8080 IF V=2 THEN V=4:GOTO 8100
8090 IF V=4 THEN V=2

8100 Y=((-.0944*X^2)+3.4)^2*PI

8105 PRINT "x=";X;" y=";Y
8110 Y=Y*V:IF V=1 THEN V=2
8120 Z=Z+Y:GOTO 8050
8130 F=(Z*D)/3
8140 ANS=F:PRINT "ans=";F:PAUSE:GOTO 8000```

Football example:

0 start -5.5 [enter]
0 end 5.5 [enter]
0 step 20 [enter]

ans= 232.1679769 in3 - football volume (cubic inches)

(delete line 8105 if you don't want to see X and Y on the display)  Reply With Quote

6. ## Of course that's assuming it's not the New England Patriots footballs! Originally Posted by thumbs Simpson's Rule, 3-2-19

I found this website that calculated the volume of an American football with a definite integral.

https://www.math.ucdavis.edu/~morris/16B/sec5.7.pdf

As I've said before, I'm no programmer and I'm poor at math. But I wanted to see if I could work a definite integral on my TI-74. I found Simpson's Rule which is supposed to work a definite integral. I programmed Simpson's Rule on my 74. I put the definite integral on line 8100. It seems to work okay....at least it gave the results of their football example.

Code:
```8000 PRINT "Simpson's Rule":PAUSE 1:Z=0:V=1:Y=0
8005 PRINT "Def.Integral..line 8100":PAUSE 1
8010 PRINT A;"start ";:ACCEPT NULL(A),A
8020 PRINT B;"end ";:ACCEPT NULL(B),B
8030 PRINT C;"step ";:ACCEPT NULL(C),C
8040 D=(B-A)/C:X=A-D
8045 IF (C/2)-INT(C/2)>0 THEN PRINT "..step even #s only":PAUSE :GOTO 8030
8050 X=X+D:IF X>B THEN 8130
8060 IF X=B THEN V=1
8070 IF V=1 THEN 8100
8080 IF V=2 THEN V=4:GOTO 8100
8090 IF V=4 THEN V=2

8100 Y=((-.0944*X^2)+3.4)^2*PI

8105 PRINT "x=";X;" y=";Y
8110 Y=Y*V:IF V=1 THEN V=2
8120 Z=Z+Y:GOTO 8050
8130 F=(Z*D)/3
8140 ANS=F:PRINT "ans=";F:PAUSE:GOTO 8000```

Football example:

0 start -5.5 [enter]
0 end 5.5 [enter]
0 step 20 [enter]

ans= 232.1679769 in3 - football volume (cubic inches)

(delete line 8105 if you don't want to see X and Y on the display)  Reply With Quote

7. Member
Join Date
Jan 2018
Posts
34

## Calories Burned Cycling, 4-3-19

Now that the weather's warmer, I'm back on my bicycle. If I didn't ride my bicycle I'd probably not excercise at all. I vary my ride frequently and often wonder how many calories a given ride burns. I found this Calories Burned Cycling calculator online:

https://captaincalculator.com/health...ng-calculator/

It seems to work good. I decided to write a program for my Ti-74 using their math and info. The Ti-74 yields results pretty close to the example given. Checkout the website for more detailed information with an explanation and examples of MET. I did include some of their MET values I thought were pertinent.

Code:
```1400 DATA met number is the..
1402 DATA metabolic equivalent of task
1405 DATA leisure 5.5 mph = 3.5 met
1410 DATA leisure 9.4 mph = 5.8 met
1420 DATA bicycling general = 7.5 met
1430 DATA mountain general = 8.5 met
1440 DATA fast 14-15.9 mph = 10 met
1450 DATA racing 16-19 mph = 12 met
1490 DATA end

1500 PRINT "Calories Burned Cycling":PAUSE .8:A7\$="":RESTORE 1400
1510 PRINT W;"your weight ";:ACCEPT NULL(W),W
1520 PRINT CW\$;" (l)bs or (k)gs ";:ACCEPT NULL(CW\$),CW\$
1530 IF CW\$="l"THEN WT=W*0.45359237:GOTO 1560
1540 IF CW\$="k"THEN 1560
1550 GOTO 1520

1560 PRINT MT\$;" (m)et or (v)iew ";:ACCEPT NULL(MT\$),MT\$
1570 IF MT\$="v"THEN 1600 ELSE 1590
1580 GOTO 1560
1590 PRINT MET;"met ";:ACCEPT NULL(MET),MET:GOTO 1630

1610 IF A7\$="end"THEN RESTORE 1400:GOTO 1560
1615 PRINT A7\$:PAUSE
1620 GOTO 1600

1630 PRINT MIN;"ride mins ";:ACCEPT NULL(MIN),MIN
1640 ANS=((MET*WT*3.5)/200)*MIN
1650 PRINT USING"ans calories burned ####.#";ANS:PAUSE:GOTO 1500```

Example:

(l)bs or (k)gs l [enter] -- pounds or kilograms
(m)et or (v)iew m [enter] -- to enter or view met value
0 met 5.8 [enter] -- met number from list
0 ride mins 80 [enter] -- total minutes of bike ride

ans calories burned 589.3

l (l)bs or (k)gs k [enter]
m (m)et or (v)iew [enter]
5.8 met [enter]
80 ride mins [enter]

ans calories burned 589.3  Reply With Quote

8. Member
Join Date
Jan 2018
Posts
34

## Calories Burned Cycling, corrections, 4-4-19

I found some errors. Change:

1540 IF CW\$="k"THEN WT=W:GOTO 1560

1570 IF MT\$="v"THEN 1600
1575 IF MT\$="m"THEN 1590

The Kgs example result: 590.5

If I find anymore, I'll let you know. Like I've said, I'm no programmer.  Reply With Quote

9. Member
Join Date
Jan 2018
Posts
34

## Right Triangle, 5-17-19

I like playing with old cars. I needed something more flexible than P>R and R>P for suspension geometry and body angles. I made this program for my ti74 that works a right triangle. I tried to describe the labeling I used for the right triangle in the program with text. On input type h for help. All angles are in degrees decimal (deg dec).

I used this prompt for input, " _ _>_ _;_ _ " for "sa>sb;aa" meaning I want Side A using Side B and Angle A. The underscore characters "_ _" in the prompt are [ctl]  keyboard characters without any space between.

Before using Right Triangle, run through every input to be sure it's yielding accurate known results. (see IF/THENs below) I gave a right triangle sides and angles example. Expect some rounding error in example results.

After viewing answer with following input values use [space] to repeat the answer. And like usual, I'm no programmer or math expert but the program seems to work good for me.

Code:
```14000 PRINT "Right Triangle":PAUSE .6:RESTORE 14400:ON ERROR 14490
14005 Z\$=D\$:PRINT D\$;:INPUT "  _ _>_ _;_ _  ";D\$:IF D\$=""THEN D\$=Z\$
14008 IF D\$="h"THEN 14300

14010 IF D\$="sa>sb;aa"THEN INPUT "sb ";B,"aa ";C:F=B*TAN(C):GOTO 14210
14020 IF D\$="sa>sc;aa"THEN INPUT "sc ";B,"aa ";C:F=B*SIN(C):GOTO 14210
14030 IF D\$="sa>sc;ab"THEN INPUT "sc ";B,"ab ";C:F=B*COS(C):GOTO 14210
14040 IF D\$="sb>sc;aa"THEN INPUT "sc ";B,"aa ";C:F=B*COS(C):GOTO 14210
14050 IF D\$="sb>sa;ab"THEN INPUT "sa ";B,"ab ";C:F=B*TAN(C):GOTO 14210
14060 IF D\$="sb>sa;aa"THEN INPUT "sa ";B,"aa ";C:F=B/TAN(C):GOTO 14210
14070 IF D\$="sc>sa;aa"THEN INPUT "sa ";B,"aa ";C:F=B/SIN(C):GOTO 14210
14080 IF D\$="sc>sb;aa"THEN INPUT "sb ";B,"aa ";C:F=B/COS(C):GOTO 14210
14090 IF D\$="sc>sa;ab"THEN INPUT "sa ";B,"ab ";C:F=B/COS(C):GOTO 14210

14100 IF D\$="aa>sa;sc"THEN INPUT "sa ";B,"sc ";C:F=ASIN(B/C):GOTO 14210
14110 IF D\$="aa>sb;sc"THEN INPUT "sb ";B,"sc ";C:F=ACOS(B/C):GOTO 14210
14120 IF D\$="aa>sa;sb"THEN INPUT "sa ";B,"sb ";C:F=ATN(B/C):GOTO 14210
14130 IF D\$="ab>sb;sc"THEN INPUT "sb ";B,"sc ";C:F=ASIN(B/C):GOTO 14210
14140 IF D\$="ab>sa;sc"THEN INPUT "sa ";B,"sc ";C:F=ACOS(B/C):GOTO 14210
14150 IF D\$="ab>sa;sb"THEN INPUT "sa ";C,"sb ";B:F=ATN(B/C):GOTO 14210

14160 IF D\$="sa>sb;sc"THEN INPUT "sb ";C,"sc ";B:F=SQR(B^2-C^2):GOTO 14200
14170 IF D\$="sb>sa;sc"THEN INPUT "sa ";C,"sc ";B:F=SQR(B^2-C^2):GOTO 14200
14180 IF D\$="sc>sa;sb"THEN INPUT "sa ";C,"sb ";B:F=SQR(C^2+B^2):GOTO 14200

14200 E=B:B=C:C=E
14210 ANS=F:PRINT "ans";F;SEG\$(D\$,1,2):PAUSE:PRINT SEG\$(D\$,4,6);" =";B;";";C
14220 A\$=KEY\$:IF A\$=" "THEN 14210 ELSE 14000

14310 IF H\$="end"THEN PRINT "end..":PAUSE 1:D\$="":GOTO 14000
14320 PRINT H\$:PAUSE
14330 GOTO 14300

14400 DATA Right Triangle Sides Angles (deg dec)
14402 DATA make an x y number line
14405 DATA where x y cross the angle is 90 deg
14410 DATA the y axis is Side A (sa)
14415 DATA the x axis is Side B (sb)
14420 DATA the hypotenuse from y to x is Side C (sc)
14425 DATA where y and hypotenuse meet is Angle B (ab)
14430 DATA where x and hypotenuse meet is Angle A (aa)
14435 DATA end

14490 PRINT "error..":PAUSE:GOTO 14000```

Example: sa=25.5:sb=120:sc=122.68:aa=12:ab=78 (expect some rounding error)  Reply With Quote

10. Member
Join Date
Jan 2018
Posts
34

## Right Triangle edit: 5-17-19

To be sure you're in degree mode put DEG at the beginning of 14000:

14000 DEG:PRINT "Right Triangle":PAUSE .6:RESTORE 14400:ON ERROR 14490

For labeling, x y sides are positive:

14405 DATA where +x +y cross the angle is 90 deg  Reply With Quote

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