int N;
cin >> N;
int odd_count = 0; // 记录奇数的个数
int old_number = N; // 保存原数
while (N != 0) {
    if (_________________)
        odd_count += 1;
    N = (N - N % 10) / 10;
}
cout << old_number << "中共有 " << odd_count << " 个奇数";