write to file

[xzbit]

hi,

im trying to write a string in the 3rd line without writing or deleting any string in the 1st and 2nd line

e.g.

line 1
line 2

line 4

i tried

ofstream w("txt.txt");
				 if(w)
				 {
					 w << "";
					 w << "";
					 w << "\n\nline 3";

					 w.close();
				 }

it didnt work

the output should be

line 1
line 2
line 3
line 4

is there a right way to do it ??

thanks in advance.

[Peter87]

When you start writing to the file you will overwrite the old file.

[xzbit]

is there a possible way if i could just parse the 1st 2 lines then write it back along with the 3rd line string

e.g.

string line1, line2;
fstream w("txt.txt" ); 
                   
getline(w, line1);
getline(w, line2);

w << line1;
w << line2;   // this dont work
w << "line3";
           
 w.close();    

something like that