Read the Serial port data and print into text file

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1

I'm trying to print the Serial data packet value in text file, the data packet coming from Arduino due board,

Arduino code:

                    void setup()
                  {
                       Serial.begin(9600)
                       uint16_t packet[8];
                   }

                 void loop()
                 {
                    for(int i=0 ;i<8;i++)
                     {
                         Packet[i]=0x0A31+i;
                    
                         Serial.println(packet[i]);
                     }
                 }



c++ code:
            //  Read function only
                read()
                 {

                  uint16_t data[8];
                  DWORD bytesRead;
                 Readfile(hcomm, &data , sizeof(data) , &bytesRead,Null);

                 File*fp;
                  fp=("c:\\data.txt","a+");
                  for(int i=o;i<7;i++)
                  {
                       fprintf(fp,"%x/t",data[i];
                  }
                       fprintf(fp,"\n");
                }

The Arduino output is :A31 A32 A33 A34 ..... (each data is 12 bit )this is correct , and then i read data from Serial port and print into text file the output is : A31A3 2A3 3A34..(i'm not getting porper 12 bit manner...)
so how to change my read function.......to print proper ( 12bit ) data in the text file

2 
                       uint16_t packet[8];

This is useless. The variable goes out of scope immediately.

                  for(int i=o;i<7;i++)

You are initializing i to o. What value is in o?

to print proper ( 12bit ) data in the text file

There are no 12 bit data types on any Arduino. You are printing as text, so the number of bits isn't relevant.