[vtkusers] saving in a file xyz witch does exist

kaouther boutara.kaouther at gmail.com
Tue Aug 21 10:53:06 EDT 2012

hi all ,i have a problem in saving  a file xyz 
well this the code 

FILE *file = fopen("file.xyz", "r");
			if(file == NULL){ //if the file doesn't exist the it will creat a new
file and save it
			writer =vtkSmartPointer<vtkSimplePointsWriter>::New();
				std::cout << "file exists." << std::endl;
			    ofstream fichier ("file.xyz",ios::out | ios::app);
					if(fichier)  // if the opening was successful
						    cerr << " the opening was successful!" << endl;

					*//	now here i want the code that makes me save the "combined" in
"file.xyz" without overwrite the existing*	

							fichier.close();  // close the file 
							cerr << "Error opening !" << endl;

i wish you can helpe me thank you 

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