<div>
I'd use<br />
<br />
#include &lt;stdlib.h&gt;<br />
<br />
BOOL myClass::isNumeric(CString<wbr /> text)<br />
{<br />
&nbsp; &nbsp;long l;<br />
&nbsp; &nbsp;char* pcCnvEnd;<br />
<br />
&nbsp; &nbsp;l = strtol ( ( LPCTSTR) text, &amp;pcCnvEnd, 10);<br />
<br />
&nbsp; &nbsp;if ( *pcCnvEnd) { // conversion stopped at sth. that was not the trailing NULL byte<br />
<br />
&nbsp; &nbsp; &nbsp; &nbsp; return FALSE;<br />
&nbsp; &nbsp;}<br />
<br />
&nbsp; &nbsp; return TRUE;<br />
} 
</div>


I'd use

#include <stdlib.h>

BOOL myClass::isNumeric(CString text)
{
   long l;
   char* pcCnvEnd;

   l = strtol ( ( LPCTSTR) text, &pcCnvEnd, 10);

   if ( *pcCnvEnd) { // conversion stopped at sth. that was not the trailing NULL byte

        return FALSE;
   }

    return TRUE;
}

<div>
<div class="content wysiwyg-content">
I want to create an IsNumeric(CString) function. I have some code that seems to work, but since I am new to c++ I want to make sure it is the best way to do this.<br />
<br />
BOOL myClass::isNumeric(CString<wbr /> text)<br />
{<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CString temp;<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;temp.Format(&quot;%d&quot;, _ttoi(text));<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (temp.GetLength()==text.Ge<wbr />tLength())<wbr /> return TRUE;<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else return FALSE;<br />
}
</div>
</div>


I want to create an IsNumeric(CString) function. I have some code that seems to work, but since I am new to c++ I want to make sure it is the best way to do this.

BOOL myClass::isNumeric(CString text)
{
	CString temp;
	temp.Format("%d", _ttoi(text));
	if (temp.GetLength()==text.GetLength()) return TRUE;
	else return FALSE;
}

Test if a CString is Numeric

Kernel and system programming is the process of creating the software necessary for a computer or device to function and operate other programs. Some operating systems (such as Microsoft Windows) are proprietary, but others, such as the various Linux distributions, are open source.