runCommand(std::string strCommand)
{
    int nErr = ::system(strCommand.c_str());
    if (nErr)
        printf("runCommand error: system(%s) returned %d\n", strCommand.c_str(), nErr);
}
runCommand(std::string strCommand)
{
    int nErr = ::system(strCommand.c_str());
    if (nErr)
        printf("runCommand error: system(%s) returned %d\n", strCommand.c_str(), nErr);
}