new to c++

Hello there
i am new to c/c++
and i want a small help about I/O + time
i have this code

ifstream sin ("/Data/rfont", ios::in);

if(!sin) {

cout << "cannot open rfont.\n";
return 1;
}
char line;
char str2[255];
str2[255] = '\0';

while (!sin.eof()) {

sin.getline(str2, 254, line);

// SDL_Delay(10);

cout << sin.tellg() << '\n';
}
sin.close();

this code works fine for me, but i want to make it read the text file by time
for example to read every x seconds and 1 line
i dont have so mutch knowledge about c/c++ so if you can help me with this code i be very happy, even with some tutorial to look at about I/O & time

thanks

maybe what i ask is difficult
so i ask a littlebit different
how can i read this text over and over
when read eof then starts to read from beginning and so on
any idea?

Do you want to create an endless loop?

for tihs yes i want to read 2 texts over and over continuity
any idea ?

ifstream sin ("/Data/rfont", ios::in);

if(!sin) {

cout << "cannot open rfont.\n";
return 1;
}
char line;
char str2[255];
str2[255] = '\0';

int loop = 1;

while (loop == 1) {

sin.getline(str2, 254, line);

cout << sin.tellg() << '\n';
}


That should create an endless loop.