formatting of data

[BigDaz]

if i have a 16-bit integer (i.e. 12345) and i want to send it via tcp/ip how can i send it as two 8-bit bytes and not as 5 char bytes (i.e. '1', '2', '3', '4', '5')?

how can i format the integer before sending so that it takes up as little space as possible?

thanks, bigdaz

 

[branyesz]

Your example was 12345. This is 3039 in hexa. So you can send first 30H and after that 39H(the order is irelevant)
......
__int16 yourNumber=12345;
BYTE firstByte, secondByte;
firstByte=BYTE(yourNumber>>8);//now firstByte is 30H
yourNumber=yourNumber<<8;// yourNumber become 3900H
yourNumber=yourNumber>>8;// yourNumber become 0039H
secondByte=BYTE(yourNumber);//now secondByte is 39H
// send firstByte and secondByte
.......

on the other side build the number
__int16 yourNumber;
BYTE firstByte, secondByte;
//...receive the firstByte, secondByte
yourNumber=firstByte;
yourNumber=yourNumber<<8;
yourNumber+=secondByte;

// now yourNumber=12345