istream的ignore使用,该如何解决

istream的ignore使用

C/C++ code

int _tmain(int argc, _TCHAR* argv[]){    int val;    ifstream ifile("1.dat");    while (ifile >> val, !ifile.eof())    {        if (ifile.bad())            throw runtime_error("IO System Error.");                if (ifile.fail())        {            cerr << "bad val, try again";            ifile.clear(ifstream::failbit);            ifile.ignore(20, ' ');            continue;        }        cout << val;    }    return 0;}

C/C++ code

int main(){     int val;    ifstream ifile("1.dat");    while (ifile >> val, !ifile.eof())    {        if (ifile.bad())            throw runtime_error("IO System Error.");                if (ifile.fail())        {            ifile.clear();            ifile.ignore(20, ' ');            continue;        }        cout << val << " ";    }    return 0;}