Arduino•4mo ago

Just a quick helping thing.

So I wanna multiply multiple variables with a variable, but is there a way I can do It easier than: var1multipltyVar; var2multiplyVar; vari3multiplyVar; ...... something like this: (var1,var2,var3)multiplyVar; So I have to change the multiplyVar only once. thanks

29 Replies

TheStudierOP•4mo ago

I know you can do this for setting pinModes with a for loop, but with variables idk.

DaDev•4mo ago

@TheStudier you can make a function.

TheStudierOP•4mo ago

maths? you mean

DaDev•4mo ago

So i am understanding you. You have a value. We will call it wart. And you have a bunch of varables, say a through t and you need them all to be multiplied by wart right?

TheStudierOP•4mo ago

indeed yes

DaDev•4mo ago

Yes. So you make a function to do that Its like 3 lines of code

TheStudierOP•4mo ago

okay thanks

DaDev•4mo ago

Is interger math ok?

TheStudierOP•4mo ago

the variables are floats

DaDev•4mo ago

Ok. So u need float math. So you have a void setup. And a void loop right?

TheStudierOP•4mo ago

yep

DaDev•4mo ago

Make a new function in betweene them.

TheStudierOP•4mo ago

void maths(); and I put maths(); in void loop Im actually wondering why I need to make a new function, cant the code to just void loop? Or does the function I made work differently to void loop

DaDev•4mo ago

float multiplyer(float top, float bottom){
return(top * bottom);
}

float multiplyer(float top, float bottom){
return(top * bottom);
}

Now in your code just pass your varables into that function. And pull the data out of that function

TheStudierOP•4mo ago

hmm whose is better omg??

DaDev•4mo ago

That should be fine

TheStudierOP•4mo ago

hmm float myFloat[6]; void thing() { for (int i = 0; i < 6; i++) { myFloat[i] = 22.0 / 7.0 * i; } } so what is the 22.0/7.0 how can i use code block

DaDev•4mo ago

I thought the values were dynamic. Hence the function. Thats why I asked a chain of varables if its just a bunch of statics then its pointless just code the pre processor to set them ino

TheStudierOP•4mo ago

cpp float myFloat[6];

void thing() {
  for (int i = 0; i < 6; i++) {
    myFloat[i] = 22.0 / 7.0 * i;
  }
}
so what is the 22.0/7.0

cpp float myFloat[6];

void thing() {
  for (int i = 0; i < 6; i++) {
    myFloat[i] = 22.0 / 7.0 * i;
  }
}
so what is the 22.0/7.0

cpp oaky so does the original float change? okay

DaDev•4mo ago

So its 3.14, then 6.28 ...... so just set the values

TheStudierOP•4mo ago

damn why cant arduino just have code like this

cpp pinMode(1,2,3,4,5,6,OUTPUT);

cpp pinMode(1,2,3,4,5,6,OUTPUT);

cpp

DaDev•4mo ago

Because its bad form

TheStudierOP•4mo ago

okay

DaDev•4mo ago

You can make a function to do that. 😉

TheStudierOP•4mo ago

Can you if those numers are variables? That what I asked, hopefully you undersoots, I mena that was my original question.

DaDev•4mo ago

You can but then you slow cpp down Thats why what it takes python 37 days to do cpp does in 15 secconds. Is because of this exactly

TheStudierOP•4mo ago

okey thank you guys

DaDev•4mo ago

Yw. Close thread please.

TheStudierOP•4mo ago

close! !close !how

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