C++读取文本文件的程序

#include 
#include 
#include 
using namespace std;
const int SIZE = 60;
int main()
{
 char filename[SIZE];
 ifstream inFile;
 cout << "Enter name of data file: ";
 cin.getline(filename, SIZE);
 inFile.open(filename);
 if (!inFile.is_open())
 {
  cout << "Could not open the file " << filename << endl;
  cout << "Program terminating.\n";
  exit(EXIT_FAILURE);
 }
 double value;
 double sum = 0.0;
 int count = 0;
 inFile >> value;
 while (inFile.good())
 {
  ++count;
  sum += value;
  inFile >> value;
 }
 if (inFile.eof())
  cout << "End of file reached.\n";
 else if (inFile.fail())
  cout << "Input terminated by data mismatch.\n";
 else
  cout << "Input terminated for unknown reason.\n";
 if (count == 0)
  cout << "No data processed.\n";
 else
 {
  cout << "Items read: " << count << endl;
  cout << "Sum: " << sum << endl;
  cout << "Average: " << sum / count << endl;
 }
 inFile.close();
 system("pause");
 return 0;
}