subject_32997.htm

一些关于vc的问答

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序号：32997 发表者：rayjoe 发表日期：2003-03-17 10:26:11
<br>主题：请教编译错误，关于类模板。
<br>内容：定义如下，使用vc6.0编译：<BR><BR>template &lt; class elemType&gt;<BR>class Array<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;explicit Array(int size=DefaultArraySize);<BR>&nbsp;&nbsp;&nbsp;&nbsp;Array( elemType* array, int array_size );<BR>&nbsp;&nbsp;&nbsp;&nbsp;Array(const Array &amp;rhs );<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual ~Array() {delete[] ia;}<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;bool operator==(const Array&amp;) const;<BR>&nbsp;&nbsp;&nbsp;&nbsp;bool operator!=(const Array&amp;) const;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;Array&amp; operator=(const Array&amp;);<BR>&nbsp;&nbsp;&nbsp;&nbsp;int size() const{return _size;}<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual elemType&amp; operator[]( int index) {return ia[index];}<BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual void sort();<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual elemType min() const;<BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual elemType max() const;<BR>&nbsp;&nbsp;&nbsp;&nbsp;virtual int find(const elemType &amp;value) const;<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;protected:<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;static const int DefaultArraySize;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int _size;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;elemType* ia;<BR>};<BR><BR>const int Array&lt;elemType&gt;::DefaultArraySize=12;&nbsp;&nbsp; //A<BR><BR>错误是：<BR>1，error C2065: 'elemType' : undeclared identifier<BR>2，'Array' : use of class template requires template argument list<BR>3，fatal error C1903: unable to recover from previous error(s); stopping compilation<BR>全都指向最后一行，文中A处。<BR><BR>清高手指点一下。
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<font color=red>答案被接受</font><br>回复者：sdfsd 回复日期：2003-03-17 13:08:42
<br>内容：最后一行改行：<BR>template&lt;class elemType&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;const int Array&lt;elemType&gt;::DefaultArraySize = 12;<BR>2003-3-17 22:26:48