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FileTools[Text]

  

ReadNextFloat

  

read the next float from a file

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

ReadNextFloat(file)

Parameters

file

-

file descriptor or filename

Description

• 

The ReadNextFloat(file) command attempts to read a float from file.  The ReadNextFloat function skips characters until it finds a valid float.  It then reads the float and returns it.  If no characters match a valid float, then the end of file is reached and NULL is returned.

• 

If file is the name of a file that has not been opened, Maple attempts to open the file before attempting to read the float.

• 

An error is raised if file is not a valid descriptor or if it is the name of a file that cannot be opened.

Examples

FileTools[Text][WriteString]testfile,2.73 to 3.14 for

16

(1)

FileTools[Text][Close]testfile:

FileTools[Text][ReadNextFloat]testfile

2.73

(2)

FileTools[Text][ReadNextFloat]testfile

3.14

(3)

FileTools[Text][ReadNextFloat]testfile

FileTools[AtEndOfFile]testfile

true

(4)

See Also

file

FileTools[AtEndOfFile]

FileTools[Text]

FileTools[Text][Close]

FileTools[Text][ReadCharacter]

FileTools[Text][ReadString]

FileTools[Text][WriteFloat]

IO_errors

 


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