导出STP需要2024后的sdk才能做到，且后续sdk会计划独立授权，需要注意一下

int main()
{
    if (!ZwSdkInitialize("ZW3D_SDK_2016_FOR_PDM", "ljR2vTOWmcn2K2b16XN8VAyHqZZ3grQisfgYOFK/jIyVOlSSzA0IVKuifQtR6lAVdOLkLKoSsM/7ObASyaTdVVoJ4cmAucqp3Tzl5bK5fZxIByk8v7qD70MVUFcR0xuRlQOlyYDlZWruUr36Ig5nWKbKA65fYsoXvdp/lVyMmntfcN8dYwg3XdSH/Zjbz/mc09EeDrNZNECs++ZeyDvrCpkJSHBqcapSo19gWAjGtrDxMzlyG54FJnsWZYLzWd9boMYNWViF/uwl5aGEJkhZNKBT8aKrUvjrnM0eBoApP15WXuaTYReyWLhY+C5BMHOzl4ZBxET+zwgQMEp1Q4/yTw"))
        return 0;
    char path[] = "E:\\1.Z3PRT";
    ZwDatabase pdb;
    ZwDbOpenFile(path, ZeAccessMode::Z_MODE_READ, &pdb);
    ZeExchangeType ex_type = Z_EXCHANGE_STEP;
    ZwStepExportData stp_data;
    strcpy_s(stp_data.Dest_Path, "E:\\1.stp");
    stp_data.Output_Type = Z_OUTPUT_PART;
    stp_data.Protocol = Z_STEPE_AP214;
    ZwDbFileExport(&pdb, ex_type, &stp_data);
    ZwDbCloseFile(&pdb);
    ZwSdkUninitialize();
    return 0;
}

效果如下