打开一个txt文件，读取里面的内容并打印出来

#!E:\Dwimperl\bin
open(FILEIP, "E:/Dwimperl/program/test/file3.txt");   ### 打开别的盘的文件
while(<FILEIP>)
{
chomp ;  # 去除换行
s/00000//ig;
print $_."\n";

}
close (FILEIP)

my $file = "file.txt";
open(FILEIP, $file);
while(<FILEIP>)
{
chomp ;  # 去除换行
s/rt/??/ig;
print $_."\n";
print "*********************************\n";

}
close (FILEIP)

读取一个txt文件，并把里面的内容进行替换，再插入到另外一个文件当中
#! /us/bin/perl -w
open (DATA1,"<file1.txt");
open (DATA2,">file2.txt");

while (<DATA1>) {
s/rt/00000/g;
print $_."\n";
print DATA2 $_;

}

close (DATA1);
close (DATA2);

#! /us/bin/perl -w
open (DATA1,"<file1.txt");
open (DATA2,">>file2.txt");

while (<DATA1>) {
s/rt/00000/g;
print $_."\n";
print DATA2 $_;

}
print DATA2 "\n";

close (DATA1);
close (DATA2);

rename("file2.txt","file3.txt");# 重全名