XQilla2.3.2读取整个xml

#include <iostream>
#include <xqilla/xqilla-simple.hpp>
#include <xqilla/runtime/Sequence.hpp>
//...
int main(int argc, char *argv[])
{
    XQilla xqilla;//构造函数中初始化Xerces-C,析构函数中释放
    //获取环境
    DynamicContext* context = XQilla::createContext();
    //加载文件到队列
    Sequence seq = context->resolveDocument(X("foo.xml"));
    //获取整个第一个结点（整个xml文件），并转化成const char*
    const Item::Ptr ptr = seq.first();
    const XMLCh* xmlp= ptr->asString(context);
    UTF8Str utf8str(xmlp);
    const char* p = utf8str.str();
    return 0;
}

void readXml() try
{    
    //获取环境
    DynamicContext* context = XQilla::createContext();
    //加载文件到队列
    Sequence seq = context->resolveDocument(X("foo.xml"));
    //获取整个第一个结点（整个xml文件），并转化成const char*
    const Item::Ptr ptr = seq.first();
    const XMLCh* xmlp= ptr->asString(context);
    UTF8Str utf8str(xmlp);
    const char* p = utf8str.str();    
}
catch(XQException& e)
{
    std::cout << "错误源文件" << e.getCppFile() << std::endl << "错误行数" << e.getCppLine() << std::endl ;
    std::cout << "错误原因"   << UTF8Str(e.getError()).str()  << std::endl ;
}
int main(int argc, char *argv[])
{
    XQilla xqilla;//构造函数中初始化Xerces-C,析构函数中释放
    readXml();
}