| filehandle/stream = a valid variable set with the OpenFile, ReadFile command, or OpenTCPStream (v1.52+) The value returned is a floating point number. |
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Once you've opened a disk file (or stream) for reading, use this command to read a single floating point number from the file. Note, each value written uses 4 bytes of space. Reading beyond the end of file does not result in an error, but each value read will be zero.
Streams can only be used in Blitz Basic v1.52 or greater. |
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; Reading and writing a file using ReadFloat and WriteFloat functions
; Initialise some variables for the example Num1# = 10.5 ; store 10.5 Num2# = 365.25 ; store 365.25 Num3# = 32767.123 ; 32767.123 is the largest positive Short Integer Value in BlitzBasic ) Num4# = -32768.123 ; -32768.123 the largest negative Short Integer Value in BlitzBasic ) ; Open a file to write to fileout = WriteFile("mydata.dat") ; Write the information to the file WriteFloat( fileout, Num1 ) WriteFloat( fileout, Num2 ) WriteFloat( fileout, Num3 ) WriteFloat( fileout, Num4 ) ; Close the file CloseFile( fileout ) ; Open the file to Read filein = ReadFile("mydata.dat") Read1# = ReadFloat( filein ) Read2# = ReadFloat( filein ) Read3# = ReadFloat( filein ) Read4# = ReadFloat( filein ) ; Close the file once reading is finished CloseFile( filein ) Print "Floating Point Data Read From File - mydata.dat " Print Read1 Print Read2 Print Read3 Print Read4 WaitKey() |