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                            將輸出發送到文件的方法與處理輸入類似。例如，我們可以修改前面的程序以實現將一個文件逐行復制到另一個文件的功能。

~~~
ifstream infile ("input-file");
ofstream outfile ("output-file");

if (infile.good() == false || outfile.good() == false) {
  cout << "Unable to open one of the files." << endl;
  exit (1);
}

while (true) {
  getline (infile, line);
  if (infile.eof()) break;
  outfile << line << endl;
} 
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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