Hello~everyone I have a question my SD file content like
23.700645,120.430675
23.701023,120.431687
23.701135,120.429543
and I want get second line of Character string hypothesis two variable float d1=23.701023 floatd2=120.431687
How to write pogram then it just read second line of Character string not all file content
How to write pogram then it just read second line of Character string not all file content
Use the IDE. It IS a text editor.
There is no function to read an entire record from the SD card, because there are no records on an SD care. There are characters (byte codes) that we typically think of as end of record markers, like carriage return. But, the don't really mean anything to the SD class.
You'll have to read and store all the characters until you encounter an end of record marker. By counting the end of record markers (whatever YOU use as an end of record marker), you can determine whether you've read the second "record".