I am having following code. output of second %d in sprintf is always shown as zero. I think i am specifying wrong specifiers. Can any one help me in getting write string with right values. And this has to achieved in posix standard. Thanks for inputs
void main() { unsigned _int64 dbFileSize = 99; unsigned _int64 fileSize = 100; char buf[128]; memset(buf, 0x00, 128); sprintf(buf, "\nOD DB File Size = %d bytes \t XML file size = %d bytes", fileSize, dbFileSize); printf("The string is %s ", buf); }
Output:
The string is OD DB File Size = 100 bytes XML file size = 0 bytes
I don't know what POSIX has to say about this, but this is nicely handled by core C99:
#include <stdio.h> #include <inttypes.h> int main(void) { uint64_t dbFileSize = 99; uint64_t fileSize = 100; char buf[128]; memset(buf, 0x00, 128); sprintf( buf, "\nOD DB File Size = %" PRIu64 " bytes \t" " XML file size = %" PRIu64 " bytes\n" , fileSize, dbFileSize ); printf( "The string is %s\n", buf ); }
If your compiler isn't C99 compliant, get a different compiler. (Yes, I'm looking at you, Visual Studio.)
PS: If you are worried about portability, don't use %lld. That's for long long, but there are no guarantees that long long actually is the same as _int64 (POSIX) or int64_t (C99).
Edit: Mea culpa - I more or less brainlessly "search & replace"d the _int64 with int64_t without really looking at what I am doing. Thanks for the comments pointing out that it's uint64_t, not unsigned int64_t. Corrected.
You need to use %I64u with Visual C++.
However, on most C/C++ compiler, 64 bit integer is long long. Therefore, adopt to using long long and use %llu.
If you are looking for a portable solution, then use printf macros from <inttypes.h>. You may need to define __STDC_FORMAT_MACROS to make these available in C++.
