Weird File I/O question

Ok, i want to find out if a file contain this string on the first line...

~~~blah blah blah~~~

(Any thing can be on the next lines)

And if it does delete it from the file, and make the line after that line the first line.

Any ideas?

[Vlatko]

Hre is the code to find the string in the first line but for making it the first line i am not sure how.

#include <iostream.h>
#include <string>
#include <fstream>
using namespace std;

int main(int argc, char* argv[])
{
ifstream ifile("c:\\textfile.txt");
string text;
getline(ifile,text);
int pos = text.find ("~~~blah blah blah~~~",0); //if pos != -1 then string found
cout<<pos<<endl;

return 0;
}

if you are using namespace std you can't include .h on iostream either...