📄 online judge论坛-acm-icpc-[第06篇]acm-icpc竞赛之stl--string.htm
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标题：<font color=red>[第06篇]ACM/ICPC竞赛之STL--string</font> </th>
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<td width="*" height="100%" style="font-size:9pt;line-height:12pt" valign="top"><img src="Skins/Default/topicface/face1.gif" border="0" alt="发贴心情" align="absmiddle"> <B>[第06篇]ACM/ICPC竞赛之STL--string</B><BR><br><H1 align=center>第06篇 ACM/ICPC竞赛之STL--string</H1><P>字符串是程序中经常要表达和处理的数据，我们通常是采用字符数组或字符指针来表示字符串。STL为我们提供了另一种使用起来更为便捷的字符串的表达方式：string。string类的定义在头文件<string>中。</P><P>string类其实可以看作是一个字符的vector，vector上的各种操作都可以适用于string，另外，string类对象还支持字符串的拼合、转换等操作。</P><P>下面先来看一个简单的例子：</P><BLOCKQUOTE><P>#include <iostream><br>#include <string><br>using namespace std;<br>main()<br>{<br> string s = "Hello! ", name;<br> cin >> name;<br> s += name;<br> s += '!';<br> cout << s << endl;<br> return 1;<br>}<br></P></BLOCKQUOTE><P>再以题1064--Parencoding为例，看一段用string作为容器，实现由P代码还原括号字符串的示例代码片段：</P><BLOCKQUOTE><P>int m;<br>cin >> m; // P编码的长度<br>string str; // 用来存放还原出来的括号字符串<br>int leftpa = 0; // 记录已出现的左括号的总数<br>for (int j=0; j<m; j++)<br>{ <br> int p;<br> cin >> p;<br> for (int k=0; k<p-leftpa; k++) str += '(';<br> str += ')';<br> leftpa = p;<br>}</P></BLOCKQUOTE><br><br><div align=right><font color=#000066>[此贴子已经被作者于2005-10-4 17:39:06编辑过]</font></div></td>
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