Search results
16 kwi 2021 · I'm trying to set my temperature measurements to two decimal places. Currently what I get are six decimal places. Here is my code: #include "math.h". ... (in loop) temp1 = sensors.getTempCByIndex(0); temp1 = roundf(temp1*100)/100;
16 lip 2016 · On Arduino, float variables are single precision and have accuracy to only 6-7 decimal places. To get 9 decimal places, all calculations must be done using long integers.
10 lip 2017 · I need to round and truncate floats to 2 decimal points then compare with other floats which have 2 decimal precision. Stream is copied into String first then manipulations are done sorting values. String a=1.1234567e-02; float B=a.toFloat(); //now is 0.0123456. float c=b*10000.0; int d=(int)c; float e=(float)d/10000.0
27 sie 2009 · #define ROUNDF(f, c) (((float)((int)((f) * (c))) / (c))) Here is an example: float x = ROUNDF(3.141592, 100) x equals 3.14 :)
27 wrz 2014 · If you want only two, you could multiply your float by 100 and cast it into an int or a long integer type. float r =13.436565; float y; int x; x = (int (13.436565*100)) ; y = float (x)/ 100; example of Nick , it is just for printing not for store in a variable .
10 maj 2016 · float x = 3154681.124 / 100000; //x = 31.54; x is now 31.5468112 (or close to). Serial.println(x); Output: 31.54. Why? Because Serial.println defaults to 2 decimal places for floats. Syntax. Serial.println(val) Serial.println(val, format) Parameters. val: the value to print - any data type
1 dzień temu · The float data type has only 6-7 decimal digits of precision. That means the total number of digits, not the number to the right of the decimal point. Unlike other platforms, where you can get more precision by using a double (e.g. up to 15 digits), on the Arduino, double is the same size as float.
