Files - moving around
fp = fopen(“somefile”,”rb”);
offset = ftell(fp); /* return current position */
/*1. move offset characters from the beginning of the
2. move offset characters from the current position
in the file (origin = 1);
3. move offset characters from the end of the file
e.g. fseek(fp, 0L, 0) sets the current position to the beginning of the file “somefile”