Assuming a file consists of fixed-length logical records, whose type is defined as t_record. The operating system only supports sequential-access to files via the following three system calls. t_record *read_next() // read the next record pointed to by the file pointer, advance the file pointer by one record, // and return a pointer pointing to the record read from the file void write_next(t_record rec) // write the record rec to the location pointed to by the file pointer, // and advance the file pointer by one record void reset() //reset the file pointer to the beginning of the file WRITE code in C (NO syntax error, please!) to implement/define the following two C functions to simulate direct access read and write operations on this operating system that only supports sequential-access to files. (Hint: there is no guarantee on where the file pointer is when any one of the following two functions is called.) t_record *read(int n) // read the n-th record in the file, and return a pointer pointing to the record read void write(int n, t_record rec) // write the record rec to the file as the n-th record       Hint t_record*read(int n) { Int i; t_record*p; reset(); for (i=0, I< (n-1);i++){ read_next (); }

please write C code

4, Assuming a file consists of fixed-length logical records, whose type is defined as t_record. The operating system only supports sequential-access to files via the following three system calls.

t_record *read_next() // read the next record pointed to by the file pointer, advance the file pointer by one record,

// and return a pointer pointing to the record read from the file

void write_next(t_record rec) // write the record rec to the location pointed to by the file pointer,

// and advance the file pointer by one record

void reset() //reset the file pointer to the beginning of the file

WRITE code in C (NO syntax error, please!) to implement/define the following two C functions to simulate direct access read and write operations on this operating system that only supports sequential-access to files. (Hint: there is no guarantee on where the file pointer is when any one of the following two functions is called.)

t_record *read(int n) // read the n-th record in the file, and return a pointer pointing to the record read

void write(int n, t_record rec) // write the record rec to the file as the n-th record

Hint

t_record*read(int n)

{

Int i;

t_record*p;

reset();

for (i=0, I< (n-1);i++){

read_next ();

}