Writing to a file without overwriting

I need to know how to write to a file without overwriting stuff in it.

This is what my program needs to do.
its opens up a c++ file
looks for the main function
and inserts a few lines of code into the main function
i can get it to write inside the main function
but when i write, it overwrites whats already there
like when u have insert pressed down in Word

Any help would be great.

Thanks

you need to set the output in "append" mode....

for example:

Code:

---


ofstream fout("c:/My Documents/TextFile.txt", ios::app);

---

in this example whatever you want to add to a file will be inserted after the last item in a file thus no items will be overwritten.....

Good Luck

matheo917

I need to write to the middle of the file though, so i'm using ios::ate. I'm also using tellg and seekp to place the cursor at the point where i want to write.

cursor = inFile.tellg();

cout << cursor;

outFile.open( "test.cpp", ios::ate);

if(!outFile){
cerr << "File could not be opened." << endl;
exit (1);
}

outFile.seekp( cursor );

char coutstring[ 80 ] = "string";

outFile.write( "cout << virus << endl;\n", 20);