Opening a file as binary and editing it

[abdoelmasry]

Hi All
Please any one can help me to complete my code !
My code is about opening file as binary and edit it

#include <iostream>
#include <iostream>
using namespace std;

int main(){
fstream nfile;
nfile.open("new .txt",ios::in|i os::out|ios::bi nary);
nfile.seekp(2);
nfile<<"code";
return 0;
}

my main problem is:
I need to insert my text in file after the position that i have set pointer on it
but
without replacing any data from file
Ex:.

if the file have string:
EGYHK.COM

i want this text be (EGcodeYHK.COM)
but when i run my code.. it's delete any characters after starting pointer place
i got it:
EGcodeCOM
not
EGcodeYHK.COM

sorry im not so good in english
i hope that i explained my mean
I Want To Put String Not Write it above the existing string in the file

Thank You

[vinothg]

When you open the binary file add ios::ate so that the string will get appended instead of overwriting i.e

nfile.open("new .txt",ios::in|i os::out|ios::at e|ios::binary);

Hope it will work !!!

[abdoelmasry]

Thank You vinothg for Help
But
this code will add my code at the end of file
i need to add it at the before the first line of file

-i have this string in a file:(is my love)

-i need to add string (programming) to the file

-your code using ios::ate will make string in my file: (is my love programming)

-i want it : (programming is my love)


Thanks

[vinothg]

Ok if you know the exact offset where you want to append then this piece of code may help you.

#include <iostream>
#include <fstream>
using namespace std;

int main(){
ofstream os("test",ios:: out|ios::app|io s::binary);
os.seekg(20,ios ::beg);
char buffer[3] = {"Hi"}
os.write((char* )(&buffer),size of(buffer));
os.close();
}

[abdoelmasry]

i found this code in many forums
i think it's right but it's not working with me
i always found a strange characters in test file