code in 2 or 3 lines to convert hex value to ascii

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Hi,

here is my code

1)

long crcVal=22271827222;

tempFile<<hex<<crcVal;

same crcVal, i want to convert into ascii?
help me in this.

2)

long bufflength=1500;

tempFile<<bin<<bufflength // here it is not printing binary number ,some decimal value is printing in the file.

here i want to print the bufflength in binary number into the file.

please help me in this regard

thanks in advance

Bye

Posted 14-Aug-12 21:21pm

JOYKAIGA1

Updated 14-Aug-12 21:58pm

Joan M

v2

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Philip Stuyck · Answer 1 · 2012-08-14T21:27:00

Solution 1

Your filestream should be opened for binary writing.

see http://www.cplusplus.com/reference/iostream/fstream/fstream/[^]

so you should get something like this :
fstream

filestr ("test.bin", fstream::in | fstream::out | fstream::binary);
fstream << crcVal;

Posted 14-Aug-12 21:27pm

Philip Stuyck

v2

Comments

JOYKAIGA1 15-Aug-12 3:31am

its not test.bin file or a binary file.
its only a file with some extension.into that i have to write crcval in the binary number?

Philip Stuyck 15-Aug-12 3:39am

ah sorry I misunderstood. you can test the same using cout.
so cout << hex << (int)5 << endl;
for example prints to the screen.
It should work though.

JOYKAIGA1 15-Aug-12 3:40am

how about the binary number to print?

Philip Stuyck 15-Aug-12 3:44am

you mean with 0 and 1 ?
there is no binary manipulator, check
http://www.cplusplus.com/reference/iostream/manipulators/
so you will have to convert to a binary string yourself.
an example how to this can be found here
http://www.cplusplus.com/reference/clibrary/cstdlib/itoa/

JOYKAIGA1 15-Aug-12 3:46am

yes, with 0 and 1 only?

Philip Stuyck 15-Aug-12 3:48am

updated my comment

JOYKAIGA1 15-Aug-12 4:12am

Thanks for suggestion and valuable answers
i will try and come back to you .

ridoy · Answer 2 · 2012-08-15T00:21:00

Solution 2

http://stackoverflow.com/questions/8147175/how-to-convert-long-long-ascii-hex-values-into-a-string[^]
http://www.dreamincode.net/forums/topic/193194-convert-hex-to-ascii/[^]

Posted 15-Aug-12 0:21am

ridoy