This code can be used to convert Excel to PDF in C++. For more details, refer to the article https://kb.aspose.com/cells/cpp/how-to-convert-excel-to-pdf-using-cpp/

ConvertExcelToPDF.cpp

#pragma once
#include "Aspose.Cells.h"

using namespace std;

class ExcelToPDFEx
{
public:
    void ConvertExcelWorkbookToPDF()
    {
        // Set Aspose.Cells API License
        intrusive_ptr<License> LicenseForExcelToPDF = new License();
        LicenseForExcelToPDF->SetLicense(new String("Aspose.Cells.NET.lic"));
     
        // Load the sample input Excel
        intrusive_ptr<Aspose::Cells::IWorkbook> workbook = Factory::CreateIWorkbook(new String("input.xlsx"));

        // Save the output Excel Document in PDF format
        workbook->Save(new String("OutputExcelToPDF.pdf"), SaveFormat_Pdf);
    }
};