file io problem

[yawningdog]

Consider the following code.

// memberio - opening Files for read and write
#include <fstream.h>
int main()
{
	char Name[80];
	char info[255];		//for user input
	int days = 1;
	cout << "Member's name: ";
	cin >> Name;

	ofstream fout(Name);	// open for writing
	fout << Name << "\n";
	fout << days << "\n";
	cout << "Enter comments: ";
	cin.ignore(1,'\n');		// eat the newline after the filename
	cin.getline(info,255);	// get the user's input
	fout << info << "\n";		// and write it to the file
	fout.close();				// close the file, ready for reopen

	ifstream fin(Name);		// reopen for reading
	cout << "Here's the contents of the file:\n";
	char ch;
	while (fin.get(ch))
		cout << ch;

	cout << "\n***End of file contents.***\n";

	fin.close();				// always pays to be tidy
return 0;
}

So far everything works like I need it to. output of the code looks like...

yawningdog
1
swell guy
***End of file contents***

What I want to do is retrieve the int days, increment it by 1 (++) and overwrite to the file. How do I do this?
I can probably parse it out with cin.peek, but there's got to be a better way.

[redhead]

Just as, when you read the file and print it to stdout, you know the second line is the days, read that, parse it as int, increment and write the incremented..

The altering of the filecontense do require you to use a temporary file, ie:

int count=1;
char my_temp_file[8];
char line[256];
strcpy(my_temp_file, "XXXXXX");
if(!mktemp(my_temp_file))
   {
        cout << "Error in creating temporary file.\n";
        return -1;
   }
ofstream fout(my_temp_file);
ifstream fin(Name);
while (fin.getline(line, 255))
     {
         if(2 == count++)
           {
              // it's the days, alter that.. 
            }
       fout << line;
      }
fout.close();
fin.close();
if(!rename(my_temp_file, Name))
     // everything went well
else
    // failed to overwrite old file..

rename() comes from stdio.h and mktemp() comes from stdlib.h, in C++ I guess these would be stdlib and stdio.

[yawningdog]

Oh yeah, I'm "using namespace std;" if that matters. So it's really <fstream> and not <fstream.h>

Everything seems pretty clear until the while loop.

while (fin.getline(line, 255))
     {
         if(2 == count++)
           {
              // it's the days, alter that.. 
            }
       fout << line;
      }

Is this what parses to the second line of the file? As far as I can tell, what this does is open the Name file, look for an int which is one more than count and write it to a temp file.

In the if statement, does the "2" represent the second line of the file? I also don't quite get why the comment is in brackets.

I'm grateful for the help, and thanks for being patient.