Format specifier for 'long long'

Question

I declare a variable for a 64 bit counter as :

long long call_count;

What is the format specifier that I should use in print statements?

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Answer 1

This one and even little more has been described here: cross-platform printing of 64-bit integers with printf

TL;DR: You can use PRId64 macro (from inttypes.h) to print 64 bit integers in decimal in a semi-portable way. There are also other macros (like PRIx64).