描述
如果下一次读取FILEHANDLE将返回文件末尾,或者FILEHANDLE未打开,则此函数返回1。
An eof without an argument uses the last file read. Using eof() with empty parentheses is very different. It refers to the pseudo file formed from the files listed on the command line and accessed via the <> operator.
语法
以下是此函数的简单语法-
eof FILEHANDLE eof() eof
返回值
如果FILEHANDLE不在文件末尾,则此函数返回undef；如果FILEHANDLE在下次读取时报告文件末尾,则此函数返回1。
例
以下是显示其基本用法的示例代码-
# insert dashes just before last line of last file
while (<>) {
if (eof()) { # check for end of last file
print "--------------\n";
}
print;
last if eof(); # needed if we're reading from a terminal
}
