Variable that are longer than unsigned long.

Projects Programming
1

One of my variables is fdco=4,850,000,000. Using the Arduino Uno.
This number is too large for unsigned long (max=2^32)-1=4,294,967,295
I have tried scaling this number but the program gets too messy because then all of the variable must be scaled.
What should I do?

2

C has a long long type, usually 64 bit.

long long foo;

Don't know if arduino supports it - I don't have my compiler with me.

But is there any reason you can't use a float or double? Numbers that big - it's not often they need to be accurate to the digit.

3

I don't see long long in the command index.
Let me try your suggestion, float.
Thanks!!

5

It appears that the Serial object doesn't like long long, but the data type is supported:

void setup() {

  long long fdco = 4850000000;
  long answer;
  Serial.begin(9600);
  answer = fdco / 1000;
  Serial.println(answer);    // Had to divide it because println() doesn't like long long
}

void loop() {
  // put your main code here, to run repeatedly:

}