fread(s,i1,i2,f) Enter i2 dataitems,each of size i1 bytes,from file f to string s.
fseek(f,1,i) Move the pointer for file f a distance 1 byte from location i.
ftell(f) Return the current pointer position within file f.
fwrite(s,i1,i2,f) send i2 data items,each of size i1 bytes from string s to file f.
The data type returned for functions fread,fseek and fwrite is int and ftell is long int.
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