subject_62145.htm

vc

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序号：62145 发表者：空穴来风 发表日期：2003-11-24 22:20:52
<br>主题：急，解决马上给分！超简单题，本人刚学~~~~~~~~~~
<br>内容：帮我解答一下这题！！！！<BR>class String <BR>{<BR>public:<BR>&nbsp;&nbsp;&nbsp;&nbsp; String(){&nbsp;&nbsp;*s='\0'&nbsp;&nbsp;};<BR>&nbsp;&nbsp;&nbsp;&nbsp; String(char *p){&nbsp;&nbsp;strcpy(s,p)&nbsp;&nbsp;};<BR>&nbsp;&nbsp;&nbsp;&nbsp; char * Get(){return s&nbsp;&nbsp; };<BR>&nbsp;&nbsp;&nbsp;&nbsp; String&nbsp;&nbsp;operator+ {String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;&nbsp;&nbsp; String&nbsp;&nbsp;&amp;operator= {String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;&nbsp;&nbsp; String&nbsp;&nbsp;operator&lt;&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;&nbsp;&nbsp; String&nbsp;&nbsp;operator&gt;&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;&nbsp;&nbsp; String&nbsp;&nbsp;operator==&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>private:<BR>&nbsp;&nbsp;&nbsp;&nbsp; char s[80];<BR>};<BR>对类String ,允许下面的操作符类型：<BR>（1）使用+操作符的字符串连接；<BR>（2）使用=操作符的字符串赋值；<BR>（3）使用&lt; , &gt; 与 == 操作符的字符串比较.<BR>试写出这5个重载函数.<BR>
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回复者：xiongli 回复日期：2003-11-24 22:24:19
<br>内容：先给分！
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回复者：adam&amp;amp;ancy 回复日期：2003-11-25 00:46:11
<br>内容：函数符号重载，书里有例子的。自己看看，^_^
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<font color=red>答案被接受</font><br>回复者：红苹果 回复日期：2003-11-25 01:30:47
<br>内容：(下面都不考虑数组长度不够的问题)<BR>String&nbsp;&nbsp;String::operator+(String&amp;&nbsp;&nbsp;s2)<BR>{<BR>&nbsp;&nbsp;String temp;<BR>&nbsp;&nbsp;strcpy( temp.get(), s );<BR>&nbsp;&nbsp;strcat( temp.get(), s2.get() );<BR>&nbsp;&nbsp;return temp;<BR>}<BR>String &amp;String::operator=(String&amp;&nbsp;&nbsp;s2)<BR>{<BR>&nbsp;&nbsp;strcpy( s, s2.get() );<BR>&nbsp;&nbsp;return *this;<BR>}<BR><BR>什么意思?下面三个函数的原型错了吧：<BR>&nbsp;&nbsp;String&nbsp;&nbsp;operator&lt;&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;String&nbsp;&nbsp;operator&gt;&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;String&nbsp;&nbsp;operator==&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>应该是：<BR>&nbsp;&nbsp;BOOL&nbsp;&nbsp;operator &lt; {String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;BOOL&nbsp;&nbsp;operator&gt;&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR>&nbsp;&nbsp;BOOL&nbsp;&nbsp;operator==&nbsp;&nbsp;{String&amp;&nbsp;&nbsp;s2};<BR><BR>BOOL&nbsp;&nbsp;String::operator&lt;(String&amp;&nbsp;&nbsp;s2)<BR>{<BR>&nbsp;&nbsp; return( strcmp(s,s2.get()) &lt; 0 );<BR>}<BR>BOOL&nbsp;&nbsp;String::operator&gt;（String&amp;&nbsp;&nbsp;s2）<BR>{<BR>&nbsp;&nbsp; return ( strcmp(s,s2.get()) &gt; 0 );<BR>}<BR>BOOL&nbsp;&nbsp;String::operator==（String&amp;&nbsp;&nbsp;s2）<BR>{<BR>&nbsp;&nbsp; return ( strcmp(s,s2.get()) == 0 );<BR>}<BR><BR>怎样？对了吗？<BR><BR><BR>2003-11-25 1:32:22