need some help with C++ file output

hi guys

i have just moved to mac and before os x i had linux so anyways, i have been writing some code using C++ and Xcode but i have a silly little problem. i need to create certain folders and then certain .txt files in order to store data. i am using the following lines of code:

Code:

	fstream testfile; //test text file used by print_u_values ()
	testfile.open("//bamdadhosseini/Desktop/RBF1Dresults/u-test.txt" , fstream::in | fstream::out | fstream::trunc);	
    testfile << "# test results" << endl;
	testfile.close();
	fstream matrixtestfile; //test text file used by print_matrix ()
	matrixtestfile.open("//bamdadhosseini/Desktop/RBF1Dresults/matrix-test.txt" , fstream::in | fstream::out | fstream::trunc);	
    matrixtestfile << "# test matrix" << endl;
	matrixtestfile.close();

but i cant get the required files. i have also tried creating all the folders and even the text file but i still cant modify it using C++. i think there's something wrong with the way i'm addressing the files cause i've written the address similar to linux and im not yet familiar with the way OS X file system looks like. thanks in advance