What is the purpose of format specifier “%qd” in `printf()`?

Question

I saw format specifier %qd when browsing github code. Then I checked in GCC compiler, it\'s working fine.

#include 

int main()
{  
          


        

Answer 1

One of most interesting C language related question to answer. The symbolic literal “%qd” represent as quad word, which is specified as used to handle 64 bits effectively with the printf function in the C programming language. Also just remember that, from 1999 edition of the C standard states that sizeof(long long) >= sizeof(long), and one can infer that the range of long long has a size of at least 64 bits.