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Input/Output with files

/ Published in: C++
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  1. // writing on a text file
  2. #include <iostream>
  3. #include <fstream>
  4. using namespace std;
  5.  
  6. int main () {
  7.   ofstream myfile ("example.txt");
  8.   if (myfile.is_open())
  9.   {
  10.     myfile << "This is a line.\n";
  11.     myfile << "This is another line.\n";
  12.     myfile.close();
  13.   }
  14.   else cout << "Unable to open file";
  15.   return 0;
  16. }
  17.  
  18.  
  19. // reading a text file
  20. #include <iostream>
  21. #include <fstream>
  22. #include <string>
  23. using namespace std;
  24.  
  25. int main () {
  26.   string line;
  27.   ifstream myfile ("example.txt");
  28.   if (myfile.is_open())
  29.   {
  30.     while ( myfile.good() )
  31.     {
  32.       getline (myfile,line);
  33.       cout << line << endl;
  34.     }
  35.     myfile.close();
  36.   }
  37.  
  38.   else cout << "Unable to open file"; 
  39.  
  40.   return 0;
  41. }

URL: http://www.cplusplus.com/doc/tutorial/files/

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