c++ - 打开二进制文件写入 : terminate called after throwing an instance of 'std::ios_base::failure' 时出错

Question

我从以下代码块得到以下输出:

    //create file for writing
cout << "'" << filename.c_str() << "'" << endl;
    string outfile = filename.append(".bin");
cout << "'" << outfile.c_str() << "'" << endl;
    fstream *binfile;
    binfile->open (outfile.c_str(), ios::out | ios::binary);

打印:

'myfile.tmp'
'myfile.tmp.bin'
terminate called after throwing an instance of 'std::ios_base::failure'
  what():  basic_ios::clear

该错误是什么意思，我该如何解决？

谢谢

Answer 1

取而代之的是:

fstream *binfile;

你应该这样做:

fstream binfile("filename", fstream::in | fstream::out | fstream::binary);

然后调用:

 binfile << "write here to file";

binfile.close();

这里不需要指针。