unsigned long long to string convert

Question

I try to convert unsigned long long to string like this

unsigned long long Data = 12;
char Str[20];

sprintf(Str, "%lld",Data);

when i want to see but i always see 00

Str[0],Str[1]....;

whats the wrong !!!

Answer 1

In most cases, %llu should do the trick. But you might have to use %I64u on some Windows platforms.