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Message: [QUOTE="ramana, post: 3194362"] I'm wondering if someone could point me to the flaw in the following code that uses the while(!FP.eof()) condition to read the input data. This condition is reading the last data point of the file twice. #include <iostream> #include <fstream> using namespace std; int main(int argc, char **argv) { double x; ifstream FP("test.d"); //while(!FP.eof()){FP >> x; cout << x << endl;} // This reads the last data point of test.d twice while(FP >> x){cout<< x << endl;} // This doesn't. return 0; } /* Using either gcc 3.4.6 or gcc 4.1.3 File "test.d" has the following 2 data points: 1.1 2.2 */ Thanks...ramana [/QUOTE]