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<h2>
<a name="1205913"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">fgets</font>
</h2><hr>
<p>
<a name="1267011"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Read line from file</font>
</p>
<h3>
<a name="1205915"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Command type</font>
</h3>
<p>
<a name="1226907"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Miscellaneous</font>
</p>
<h3>
<a name="1205917"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Tool environment</font>
</h3>
<p>
<a name="1228007"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><strong>st20cc</strong>, <strong>st20libr</strong>, <strong>st20run</strong>, <strong>st20sim</strong></font>
</p>
<h3>
<a name="1205918"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
</h3>
<a name="1205919"> </a><font size=2 face=Courier><strong>fgets <font size=2 face=Courier><strong><em>filename</em></strong></font><br></strong></font>
<h3>
<a name="1205920"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
</h3>
<p>
<a name="1224086"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong><em>filename</em></strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1224088"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The file previously opened to read</font>
</dl>
</dl></dl>
<h3>
<a name="1205923"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Returns</font>
</h3>
<p>
<a name="1205924"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">A line read from the file or an empty string if it is the end of file.</font>
</p>
<h3>
<a name="1205925"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>
<p>
<a name="1262792"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The command <font size=2 face=Courier><strong>fgets</strong></font> reads one line from a file that is open for read access. It returns the string read, without any terminating new line character. Successive uses of the command return successive lines from the file.</font>
</p>
<p>
<a name="1262793"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">If an attempt is made to read past the end of the file, <font size=2 face=Courier><strong>fgets</strong></font> returns an empty string. This could be confused with empty lines, so make a call to <font size=2 face=Courier><strong>feof()</strong></font> to determine whether the end of the file has really been reached.</font>
</p>
<h3>
<a name="1205928"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Example</font>
</h3>
<p>
<a name="1205929"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The following code fragment reads a file into a command language array, then writes the file back, minus any lines containing the word "foobar".</font>
</p>
<a name="1205930"> </a><font size=2 face=Courier><strong>line_count = 0<br>infile = "myfile.in"<br><br></strong></font>
<a name="1205933"> </a><font size=2 face=Courier><strong>if ((fopen(infile, "r")) == -1) {<br>⌨️ 快捷键说明
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