WebJul 19, 2005 · Because the C++ standard predates the C99 standard by a year. it uses __int64 in some places __int64 is a implementation extension by some compilers (notably Visual C++). with a comment about strict) but freely uses 'long long' in other places. I Comments where? Uses where? C++ doesn't have any clue about either __int64 or long … WebAug 14, 2024 · C++中long long和int64_t哪个应用场景更广？. 写着玩时，long long 用得更多，因为不需要 #include 。. 写库时，int64_t 用得更多，因为你没法确定对方用的编译器中 long long 一定是64bits。. 假设int是32位的，那如果把所有int换成int_fast32_t，可以加速程序吗？. 你没 ...
__int64 vs. long long - C / C++
Web博客园 - 开发者的网上家园 Web如何使用C/C++；优化会影响可变变量吗？,c,gcc,optimization,C,Gcc,Optimization,我对一些代码有一些问题（见下文）。当所有优化都 ... eagan fmsc
c++中超出char、int范围的整数怎么存储？ - 知乎
WebMicrosoft-specific. Microsoft C/C++ features support for sized integer types. You can declare 8-, 16-, 32-, or 64-bit integer variables by using the __intN type specifier, where N is 8, 16, 32, or 64. The following example declares one variable for each of these types of sized integers: The types __int8, __int16, and __int32 are synonyms for ... WebJan 21, 2016 · It's possible for, say, an x86 C++ compiler to implement a hypothetical uint256_t (x86 processors only support arithmetic on 64-bit values and smaller). In that case, the operations would be implemented in the compiler in the same way that if , and adding two numbers, for example, would be replaced by a series of instructions that perform an ... WebNov 3, 2024 · 既然VC6.0搞出了__int64，那么微软后续的C++版本显然就必须要兼容它。所以在win系统当中，这个__int64的变量类型就一直沿用了下来。当然，由于C++标准的更新，当然最新的visual studio已经支持long long了。 GCC并不是基于windows系统的，自然支 … cshbttf-stn-d5-8