Passing an int to a function that expects char*
Hi,
I want to pass an int to a function that expects a char *. Programming in Linux, so can't use itoa.
The function header looks like this:
and calling the function with an int (I know, this won't work..)
So what must I do to
I want to pass an int to a function that expects a char *. Programming in Linux, so can't use itoa.
The function header looks like this:
void swapEndian(char *pElement, unsigned int uNumBytes)and calling the function with an int (I know, this won't work..)
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So what must I do to
numline to pass it to this function?
Last edited on
Try the following
swapEndian( reinterpret_cast<char *>( &numLine ), sizeof(int));
swapEndian( reinterpret_cast<char *>( &numLine ), sizeof(int));
reinterpret_cast is C++. Maybe this was not the correct forum to ask the question as I'm programming C, but if anyone can give me a C solution, will be appreciated.
In C there's only one cast expression, so that's what you'd use:
Note that, since you're on Linux, you can deal with the endian-ness issues using the POSIX functions htonl and ntohl: http://pubs.opengroup.org/onlinepubs/9699919799/functions/htonl.html instead of writing your own.
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Note that, since you're on Linux, you can deal with the endian-ness issues using the POSIX functions htonl and ntohl: http://pubs.opengroup.org/onlinepubs/9699919799/functions/htonl.html instead of writing your own.
If your function requires a character string, then you could use sprintf() to make the int into a string.
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