c++ - 系统()调用流文件的批处理可执行文件使程序在Windows上重置

Question

当我“构建并运行”Code::Blocks 中的程序时，它运行得非常好!但是当我从“/bin”文件夹手动运行它时，当它试图用 system() 调用“temp.bat”时，它会重置。这是为什么？它没有特定的文件依赖，它自己创建它们。这是一些代码:

         ofstream filetmp1 ("temp1.bat", ios::out | ios::binary);
               filetmp1 << "@echo off" << '\n';
               filetmp1 << "echo user xyz> script.dat" << '\n';
               filetmp1 << "echo xyz>> script.dat" << '\n';
               filetmp1 << "echo get conntest.test>> script.dat" << '\n';
               filetmp1 << "echo bye>> script.dat" << '\n';
               filetmp1 << "ftp -n -s:script.dat xyz.com" << '\n';
               filetmp1 << "del script.dat" << '\n';
               filetmp1.close();
               system ("temp1.bat");            //IF I REMOVE THIS LINE, THE PROGRAM WORKS HOW IT SHOULD, until the second system("temp1.bat")
               system ("del temp1.bat");
               system ("cls");

    cout << "All data loaded!"; Sleep(1500);
    system("cls");

    ofstream filetmp ("temp1.bat", ios::out | ios::binary);
               filetmp << "@echo off" << '\n';
               filetmp << "echo user xyz> script.dat" << '\n';
               filetmp << "echo xyz>> script.dat" << '\n';
               filetmp << "echo cd app>> script.dat" << '\n';
               filetmp << "echo lcd data>> script.dat" << '\n';
               filetmp << "echo prompt n>> script.dat" << '\n';
               filetmp << "echo mput *.txt>> script.dat" << '\n';
               filetmp << "echo bye>> script.dat" << '\n';
               filetmp << "ftp -n -s:script.dat xyz.com" << '\n';
               filetmp << "del script.dat" << '\n';
               filetmp.close();
               system ("temp1.bat");                //WITH BOTH LINES REMOVED, IT WORKS. But I do not want to remove them, because I don't know alternative ways for them
               system ("del temp1.bat");
               system ("cls");

我想我说了所有的细节。提前致谢。

Answer 1

"You must explicitly flush—by using fflush or _flushall—or close any stream before you call system." - MS Documentation

尝试刷新所有需要在 system 调用期间保持打开状态的流。 _flushall() 应该是最简单的。