2010年1月24日 · 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. It's an extended precision ...

2013年9月24日 · For example, a long is 64 bits on Linux and 32 bits on Windows (this was done to keep backwards-compatability, allowing 32-bit programs to compile on 64-bit Windows without any changes). long int is a synonym for long. Later on, long long was introduced to mean "long (64 bits) on Windows for real this time". long long int is a synonym for this.

2014年4月14日 · Per the ANSI C specification (similar language exists in C99 and C++ specifications): The type of an integer constant is the first of the corresponding list in which its value can be represented. Unsuffixed decimal: int, long int, unsigned long int. Unsuffixed octal or hexadecimal: int, unsigned int, long int, unsigned long int.

long long num3 = 100000000000LL; The suffix LL makes the literal into type long long. C is not "smart" enough to conclude this from the type on the left, the type is a property of the literal itself, not the context in which it is being used.

2015年10月3日 · The standards committee prohibited that in C11: long long int is now guaranteed to be at least as wide as long int, and long int at least as wide as int. Because a lot of programs couldn't redefine long as 64 bits without breaking, C needed a …

2011年9月18日 · "a long in C/C++ is the same length as an int." Not always. The C++ standard specifies that an int be the "natural" size for the processor, which may not always be as big as a long. The standard also guarantees that a long is at least as long as an int, so the fact that they are equal sizes are not always guaranteed. –

2010年3月31日 · The C language specification allows the implementation of int and long types to vary from one platform to another within a few constraints. This variability is a headache for cross-platform code, but it is also an asset because it enables the informed programmer to balance their design goals between native processor speed and full numeric range ...

2013年9月12日 · Parsing string to long in C. 4. cast long into pointer. 7. Troubling converting string to long long in C. 17.

2020年6月6日 · If both long and double have 64 bits, such as on almost all non-Windows 64-bit platforms, a long has more precision than a double does, so a large long value will "lose" its trailing bits when converted to a double. That means the double will represent a smaller absolute value than the original long.

long long call_count; What is the format specifier that I should use in print statements? I tried, %l, %ld, %ll. None seems to be correct. I use Diab C compiler for compiling my application code to run on pSOS operating system.