Difference between revisions of "Basic Pascal Tutorial/Chapter 2/EOLN and EOF"
m (Fixed syntax highlighting) |
|||
| (One intermediate revision by one other user not shown) | |||
| Line 1: | Line 1: | ||
{{EOLN and EOF}} | {{EOLN and EOF}} | ||
| + | {{TYNavigator|Files|Programming_Assignment_2}} | ||
2E - EOLN and EOF (author: Tao Yue, state: unchanged) | 2E - EOLN and EOF (author: Tao Yue, state: unchanged) | ||
<tt>EOLN</tt> is a Boolean function that is <tt>TRUE</tt> when you have reached the end of a line in an open input file. | <tt>EOLN</tt> is a Boolean function that is <tt>TRUE</tt> when you have reached the end of a line in an open input file. | ||
| − | <syntaxhighlight> | + | |
| + | <syntaxhighlight lang=pascal> | ||
eoln (file_variable) | eoln (file_variable) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
If you want to test to see if the standard input (the keyboard) is at an end-of-line, simply issue <tt>eoln</tt> without any parameters. This is similar to the way in which <tt>read</tt> and <tt>write</tt> use the console (keyboard and screen) if called without a file parameter. | If you want to test to see if the standard input (the keyboard) is at an end-of-line, simply issue <tt>eoln</tt> without any parameters. This is similar to the way in which <tt>read</tt> and <tt>write</tt> use the console (keyboard and screen) if called without a file parameter. | ||
| − | <syntaxhighlight> | + | |
| + | <syntaxhighlight lang=pascal> | ||
eoln | eoln | ||
</syntaxhighlight> | </syntaxhighlight> | ||
<tt>EOF</tt> is a Boolean function that is <tt>TRUE</tt> when you have reached the end of the file. | <tt>EOF</tt> is a Boolean function that is <tt>TRUE</tt> when you have reached the end of the file. | ||
| − | <syntaxhighlight> | + | |
| + | <syntaxhighlight lang=pascal> | ||
eof (file_variable) | eof (file_variable) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| Line 20: | Line 24: | ||
Usually, you don't type the <tt>end-of-file</tt> character from the keyboard. On DOS/Windows machines, the character is <tt>Control-Z</tt>. On UNIX/Linux machines, the character is <tt>Control-D</tt>. | Usually, you don't type the <tt>end-of-file</tt> character from the keyboard. On DOS/Windows machines, the character is <tt>Control-Z</tt>. On UNIX/Linux machines, the character is <tt>Control-D</tt>. | ||
| − | {| | + | {{TYNavigator|Files|Programming_Assignment_2}} |
| − | |||
| − | |||
| − | |||
| − | |||
Revision as of 13:15, 14 February 2020
│
български (bg) │
Deutsch (de) │
English (en) │
français (fr) │
日本語 (ja) │
中文（中国大陆） (zh_CN) │
2E - EOLN and EOF (author: Tao Yue, state: unchanged)
EOLN is a Boolean function that is TRUE when you have reached the end of a line in an open input file.
eoln (file_variable)
If you want to test to see if the standard input (the keyboard) is at an end-of-line, simply issue eoln without any parameters. This is similar to the way in which read and write use the console (keyboard and screen) if called without a file parameter.
eoln
EOF is a Boolean function that is TRUE when you have reached the end of the file.
eof (file_variable)
Usually, you don't type the end-of-file character from the keyboard. On DOS/Windows machines, the character is Control-Z. On UNIX/Linux machines, the character is Control-D.
