Writing to a file and not overwriting it
Hey guys, I'm trying to make a file that records a bunch of data in a file.
Well, I want the first line to be the number of entries, and then the entries follow right afterwords.
The problem is that when I try to overwrite the # of entries on the first line, the whole file is gone except for that one number!
So, I have the program check if the file exists on startup, and if not, make a new file with the first line being "0", meaning that there are no stored data.
When something is added, I want that 0 to be changed to 1, 2, etc. The current code just overwrites the whole file, though!
How can I overwrite the first line without harming the line under it, or any other parts of the file?
Code follows:
Code:
ofstream CoolFile("C:\\recipes.dat", ios::app);
if (CoolFile)
{
CoolFile << aryCurr->name << endl;
CoolFile << aryCurr->type << endl;
CoolFile << aryCurr->difficulty << endl;
CoolFile << aryCurr->peopleServed << endl;
CoolFile << aryCurr->dateAdded << endl;
CoolFile << aryCurr->numIngredient << endl;
CoolFile << aryCurr->numInstructions << endl;
for (g=0;g <=(numberOfIngredients-1);g++)
{
CoolFile << aryCurr->ingredients[g].name << endl;
CoolFile << aryCurr->ingredients[g].quantity << endl;
}
for (g=0;g <=(numberOfInstructions-1);g++)
{
CoolFile << aryCurr->instructions[g].instr << endl;
}
CoolFile.close();
ofstream CoolFile("C:\\recipes.dat", ios::ate);
CoolFile.seekp(0);
CoolFile << *current << endl;
}
CoolFile.close();
Thanks!
sirSolarius
