C++使用QPDF合并PDF文件

#include "qpdf\QPDF.hh"
#include "qpdf/QPDFWriter.hh"
#include "qpdf/QUtil.hh"

    QPDF outpdf;
    outpdf.emptyPDF();

    QPDF inpdfa;
    inpdfa.processFile("D:\\aaaa.tmp");
    std::vector<QPDFObjectHandle> apages=inpdfa.getAllPages();
    for (std::vector<QPDFObjectHandle>::iterator iter = apages.begin();
        iter != apages.end(); ++iter)
        outpdf.addPage(*iter, false);

    QPDF inpdfb;
    inpdfb.processFile("D:\\bbbb.tmp");
    std::vector<QPDFObjectHandle> bpages = inpdfb.getAllPages();
    for (std::vector<QPDFObjectHandle>::iterator iter = bpages.begin();
        iter != bpages.end(); ++iter)
        outpdf.addPage(*iter, false);

    QPDFWriter outpdfw(outpdf, "D:\\cccc.pdf");
    outpdfw.write();