[redhead]

115:  out << setw(10) << "Day" 
         << set(10) << t.day << "|" << setw(10) << "Low" 
         << set(10) << t.low << "|" << setw(10) << "High" 
         << set(10) << t.high << "|" << setw(10) << "Normal" 
         << set(10) << endl;

Do you see the error now ??

2. Open the file for input. test for failure, and repeat until a valid filename is entered.
It's not doing that, returning with exit(1); isn't telling it to ask the user again.

while(fin.fail())
{
  cout << "Enter the name of the data file: ";
  cin >> filename;
  fin.open(filename);
  if(fin.fail())
     cout << "Error opening file: " << filename << endl;
}

would be one way to achieve that.

• A line that displays the year and month of the data contained in the report.
• A header line that labels each of the columns.
• A record for each day of data read in. Each record should contain:
  • Day (as a number)
  • Low (F)
  • High (F)
  • Average (F) (which is defined as (Low + High) / 2.0).
  • Difference from normal (F) This is defined as the actual average temp minus the normal temp for the day. Use the actual number
• the bottom outputs the average temperature for the month in both Fahrenheit and Celsius.

This is not happening, you call generate_report() but itjust copies the input file directly to the output file.

Read your code closely while keeping those restrictions in mind.