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Sending Binary Data with "printf"

Parus Khan

Hi..


I want to send Binary Data using printf() function

for examle if I do 

 printf("%d",i)
where i=16706 then printf() function transmit that integer in text mode (not in Binary mode) i.e. it will send 5 bytes for 16706.
If I use %X instead of %d even then it will send 4142 in HEX....that means 4 bytes.

Now if somhow I can send the number 16706 in binary .... it will become 0xAB which is only two bytes .

so for any integer upto 65636.... I can send it as binary in only two bytes..

I f somone knows...pls let me know.


Thanks....

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  • 0 in reply to Parus Khan

    "But how can we send Binary Data when we have a float data type instead of integer."

    You will have to read the compiler Manual to find the internal representation of the float type, and then devise a means to access the individual bytes of that representation.
    This is standard 'C' stuff; the main choices are:
    [1] shift & mask - usually portable, but often slow;
    [2] use a union - non-portable, but usually quicker

    Try a 'Search', as this has definitely been discussed before!

Reply
  • 0 in reply to Parus Khan

    "But how can we send Binary Data when we have a float data type instead of integer."

    You will have to read the compiler Manual to find the internal representation of the float type, and then devise a means to access the individual bytes of that representation.
    This is standard 'C' stuff; the main choices are:
    [1] shift & mask - usually portable, but often slow;
    [2] use a union - non-portable, but usually quicker

    Try a 'Search', as this has definitely been discussed before!

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