使用 C++ 将无符号字符作为二进制存储在文件中？

Question

I have written the following code to print the data in Pin and Pout to a file:

void run() {
while ( in.readable() >= 17*11*12+SIZE_RSPACKET &&
    out.writable() >= 1 ) {
  u8 *pin = in.rd()+17*11*12, *pend=pin+SIZE_RSPACKET;
  u8 *pout= out.wr()->data;
  for ( int delay=17*11; pin<pend;
    ++pin,++pout,delay=(delay-17+17*12)%(17*12) )
*pout = pin[-delay*12];
  in.read(SIZE_RSPACKET);
  out.written(1);

 /* Printing output after Deinterleaving to file: Need to Turn this into Binary */   

FILE * F; // Create File
F = fopen("Deinterleaving.txt", "wb"); // Open Deinterleaving File 

for(int i = 0; i < SIZE_RSPACKET; i++){ // For Every Packet (204 bytes)
    // Print char for data coming and going out (Not Binary) to file
    fprintf(F, "%s %u %s %u \n", " Data coming in: ", pin[i], " Data Going Out: ", pout[i]); 

   } 
    fflush(F);
    fclose(F);
  }
}

This gives me the output:

 Data coming in:  71            Data Going Out:  0 
 Data coming in:  99            Data Going Out:  0 
 Data coming in:  46            Data Going Out:  0 
 Data coming in:  84            Data Going Out:  0 
 Data coming in:  129           Data Going Out:  0 
 Data coming in:  134           Data Going Out:  0 
 Data coming in:  1             Data Going Out:  0 
 Data coming in:  101           Data Going Out:  0 
 Data coming in:  15            Data Going Out:  1

How can I convert this to it's binary counterpart for every 8 packets so that the output will look like the following?

What the output should look like (ie 1 block (8 Packets of 204 bytes each)):

71 99 46 84 129 134 1 101 -> 01000111 01100011 0101110 01010100 010000001 010000110 00000001 01100101 

Answer 1

Use fwrite for writing internal representation of data to a file:

fwrite(&pin[0], 1, sizeof(pin), F);

Also, open the file in a binary mode to avoid translations, such as the value 0x0d being replaced by 0x0d, 0x0a .

The fprintf is for transforming internal representation into human readable form.