帮同学完成的一个实验作业：将XML的标题和内容分离。

//栈

#include<iostream>
#include<stack>
using namespace std;
int main(){
	string str;
	stack<char>tag,contents,xml;
	int i,j,k,t;
	getline(cin,str);//输入字符串str 
	for(i=0; i<str.length(); i++)
	{
		if(str[i]!='/')
		{
			xml.push(str[i]); 
		}
		
		else if(str[i]=='/')
		{
			while(xml.size()!=0)
			{
				if(xml.top()!='>')
				{
					contents.push(xml.top());
					xml.pop();
				}
				else if(xml.top()=='>')
				{
					cout<<"Contents is:";
					while(contents.size()!=1)
					{
						cout<<contents.top();
						contents.pop();
					}
					contents.pop();
					cout<<endl;
					break;
				}
			}
			tag.push('>');
			while(xml.size()!=0)
			{
				if(xml.top()!='<')
				{
					tag.push(xml.top());
					xml.pop();
				}
				else if(xml.top()=='<')
				{
					cout<<"Tag is:<";
					while(tag.size()!=1)
					{
						cout<<tag.top();
						tag.pop();
					}
					tag.pop();
					cout<<endl;
					break;
				}
			}
		}
	} 
} 

输入

<TITLE>Empire Burlesque</TITLE><ARTIST>Bob Dylan</ARTIST><COUNTRY>USA</COUNTRY> 输出 Tag is:<TITLE> Contents is:Empire Burlesque Tag is:<ARTIST> Contents is:Bob Dylan Tag is:<COUNTRY> Contents is:USA