我发现以下幻灯(我想在Wikipedia)在C++评论得到确认时,会产生不同时间:
int a = 4 //* This is a comment, but where does it end? */ 2
;
但直到现在,这只是唯一的(被排除在外的人)。
我不想使用<代码>__STDC__等加以区别,也不希望在C89不汇编的方案中加以区别。
是否有其他方案/工具,其运行时间不同于C89,而不是C99?
我发现以下幻灯(我想在Wikipedia)在C++评论得到确认时,会产生不同时间:
int a = 4 //* This is a comment, but where does it end? */ 2
;
但直到现在,这只是唯一的(被排除在外的人)。
我不想使用<代码>__STDC__等加以区别,也不希望在C89不汇编的方案中加以区别。
是否有其他方案/工具,其运行时间不同于C89,而不是C99?
本方案将印刷关于符合《公约》第89条执行情况的<编码>0.000000<>/code>和关于符合《公约》第99条执行情况的<代码>1.000000<>:>:
#include <stdio.h>
#include <stdlib.h>
int main()
{
double d = strtod("0x1", NULL);
printf("%f
", d);
return 0;
}
两个例子:
C99有-3/2
被定义为Behaviour(即拖到零)。
C99有-1<<1
,作为未定义的Behaviour(但不是C89)。
Also, in the past I ve run into problems with 64-bit enums, such as enum {mask = 1ULL << 32}
, but I don t recall if the compiler was silent, or just quietly did the wrong thing.
愤怒司可产生不同的结果,取决于你使用哪种分类方法89。
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