subject_62433.htm

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序号：62433 发表者：ljl 发表日期：2003-11-26 18:58:40
<br>主题：请大家看看这段小程序的错误如何改正？
<br>内容：#include &lt;iostream&gt;<BR>#include &lt;string&gt;<BR>#include &lt;vector&gt;<BR>#include &lt;ctype.h&gt;<BR>using namespace std;<BR><BR>int main( int argc, char *argv[])<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;string ofile;<BR>&nbsp;&nbsp;&nbsp;&nbsp;vector&lt;string, allocator&gt; file_names;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;char *pchar = &#34;hello,world&#34;;<BR>&nbsp;&nbsp;&nbsp;&nbsp;file_names.push_back(string(pchar));<BR>&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;return 0;<BR>}<BR><BR><BR>----------------------------------------------------------------------<BR>--------------------Configuration: page310 - Win32 Debug--------------------<BR>Compiling...<BR>page310.cpp<BR>F:\ljl\cppprimer\page310.cpp(10) : error C2955: 'allocator' : use of class template requires template argument list<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e:\program files xp\microsoft visual studio\vc98\include\xmemory(72) : see declaration of 'allocator'<BR>F:\ljl\cppprimer\page310.cpp(10) : error C2133: 'file_names' : unknown size<BR>F:\ljl\cppprimer\page310.cpp(10) : error C2512: 'vector&lt;class std::basic_string&lt;char,struct std::char_traits&lt;char&gt;,class std::allocator&lt;char&gt; &gt;,class std::allocator&gt;' : no appropriate default constructor available<BR>F:\ljl\cppprimer\page310.cpp(10) : error C2262: 'file_names' : cannot be destroyed<BR>F:\ljl\cppprimer\page310.cpp(13) : error C2662: 'push_back' : cannot convert 'this' pointer from 'class std::vector&lt;class std::basic_string&lt;char,struct std::char_traits&lt;char&gt;,class std::allocator&lt;char&gt; &gt;,class std::allocator&gt;' to 'class std::vector&lt;<BR>_Ty,_A&gt; &amp;'<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reason: cannot convert from 'class std::vector&lt;class std::basic_string&lt;char,struct std::char_traits&lt;char&gt;,class std::allocator&lt;char&gt; &gt;,class std::allocator&gt;' to 'class std::vector&lt;_Ty,_A&gt;'<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Conversion requires a second user-defined-conversion operator or constructor<BR>Error executing cl.exe.<BR><BR>page310.obj - 5 error(s), 0 warning(s)&nbsp;&nbsp;&nbsp;&nbsp;
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<font color=red>答案被接受</font><br>回复者：luo 回复日期：2003-11-27 16:57:51
<br>内容：只要把这句vector&lt;string,alloctor&gt; file_names改为<BR>vector&lt;string&gt; file_names就应该可以了。
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