Convert double to string / Send double using UDP

[Cloudthegreat]

Hi! Is there a library function that lets me easily convert a double into a char* string?

Or, if what I really want to do is to send a double using UDP using its sendto() funciton, how can I send and receive the double?

Thanks a lot!

[Andreas Masur]

>> Hi! Is there a library function that lets me easily convert a double into a char* string?

double dftValue = 3.1774;
char szString[25] = "";

sprintf(szString, "%.6lf", dftValue);



>> Or, if what I really want to do is to send a double using UDP using its sendto() funciton, how can >> I send and receive the double?

double dftValue = 3.1453;

sendto(Socket, reinterpret_cast<const char *>(dftValue), sizeof(dftValue), 0, NULL, 0);




Ciao, Andreas

"Software is like sex, it's better when it's free." - Linus Torvalds

[Andreas Masur]

It should be

sendto(Socket, reinterpret_cast<const char *>(&dftValue), sizeof(dftValue), 0, NULL, 0);



in my previous post....

Ciao, Andreas

"Software is like sex, it's better when it's free." - Linus Torvalds

[Cloudthegreat]

How about converting LONGLONG to string, and coverting string to LONGLONG??

Thanks!

[Andreas Masur]

1. LONGLONG to string

#include <stdlib.h>

char szBuffer[50] = "";
LONGLONG llLongLong = 5365462;

_i64toa(llLongLong, szBuffer, 10);



2. String to LONGLONG

#include <stdlib.h>

char szBuffer[] = "376329987";

LONGLONG llLongLong = _atoi64(szBuffer);





Ciao, Andreas

"Software is like sex, it's better when it's free." - Linus Torvalds