The issue with LL m = pow(2, n + 1) – 2; is that pow(2, n + 1) is not a long long. It has the type double (refer to cppreference) and because the value is so large, subtracting 2 from it will not change its value. That means that m will not have the … Read more
According to C99 standard, long long is an integer type which is at least 64-bit wide. There are two integer 64-bit types specified: long long int and unsigned long long int So, yes, this is the biggest integer type specified by C language standard (C99 version). There is also long double type specified by C99. … Read more
The C++ standard references the C standard for this, see [c.limits]. LLONG_MAX is defined in <climits> with the same meaning as C’s <limits.h>‘s LLONG_MAX. And this is what C has to say: 5.2.4.2.1 Sizes of integer types <limits.h> The values given below shall be replaced by constant expressions suitable for use in #if preprocessing directives. … Read more
The types long long and unsigned long long are standard C and standard C++ types each with at least 64 bits. All compilers I’m aware of provide these types, except possibly when in a -pedantic mode but in this case int64_t or uint64_t won’t be available with pre-C++ 2011 compilers, either. On all of the … Read more
Use the ll (el-el) long-long modifier with the u (unsigned) conversion. (Works in windows, GNU). printf(“%llu”, 285212672);