It is very
common to read from and/or write to a file in any programming language. In tcl
also, one frequently uses file operations. read
command in tcl reads the entire file and stores it into a variable. One can,
then, perform the desired operations onto the read data. The normal command
sequence to read a file in tcl language is as below:
//
script to read and display contents
set
infile [open input_file.rpt r] // Create a file pointer and point it to the
file to be read
set
file_data [read $infile] //
Assign file_data with contents of infile
close
$infile //
Detach the file pointer from file to be read
set
lines [split $file_data “\n”]
//
Split the file contents by lines and assign each line to an element of list
foreach
element $lines {
puts $element // Display each element of
$lines onto screen.
}
