当比较c#中的两个字符串是否相等时,InvariantCulture和Ordinal比较有什么区别? InvariantCulture Uses a "standard" set of character orderings (a,b,c, ... etc.). This is in contrast to some specific locales, which may sort characters in different orders ('a-with-acute' may be before or after 'a', depending on the locale, and so on). Ordinal On the other hand, looks pu
当比较c#中的两个字符串是否相等时,InvariantCulture和Ordinal比较有什么区别? InvariantCulture的 使用“标准”字符排序集(a,b,c,...等)。 这与一些特定的区域设置形成对比,这些区域设置可以按不同的顺序对字符进行排序('a-with-acute'可以在'a'之前或之后,具体取决于语言环境等等)。 序数词 另一方面,纯粹看代表字符的原始字节的值。 http://msdn.microsoft.com/en-us/library/e6883c06.a
How to calculate the difference in months between two dates in C#? Is there is equivalent of VB's DateDiff() method in C#. I need to find difference in months between two dates that are years apart. The documentation says that I can use TimeSpan like: TimeSpan ts = date1 - date2; but this gives me data in Days. I don't want to divide this number by 30 because not every month is 30
如何计算C#中两个日期之间的差异? 在C#中是否有相当于VB的DateDiff()方法。 我需要在两个相隔几年的日期之间找到几个月的差异。 该文件说,我可以使用TimeSpan : TimeSpan ts = date1 - date2; 但是这给了我几天的数据。 我不想把这个数字除以30,因为不是每个月都是30天,而且因为两个操作数值彼此很不相同,所以我除以30会给我一个错误的值。 有什么建议么? 假设月份的日期不相关(即2011.1.1与2010.12.31之间
I am trying to launch chrome browser with a single tab window using this c# code: Process process = new Process(); process.StartInfo.FileName = "chrome"; process.StartInfo.Arguments = url + " --new-window --window-size=640,480"; process.StartInfo.WindowStyle = ProcessWindowStyle.Minimized; process.Start(); The new window opens, but the size does not correspond to the size I passed along as argu
我正在尝试使用此C#代码在单个选项卡窗口中启动Chrome浏览器: Process process = new Process(); process.StartInfo.FileName = "chrome"; process.StartInfo.Arguments = url + " --new-window --window-size=640,480"; process.StartInfo.WindowStyle = ProcessWindowStyle.Minimized; process.Start(); 新窗口打开,但大小与我作为参数传递的大小不符。 chrome的命令行开关“--window-size = x,y”是否不起作用? 有没
I have been searching for a way to save the references of variables of various types into a dictionary, together with a corresponding key. Then i would like to modify the instance of the variable by accessing its reference through the dictionary by its key. For storing the references, i tried to use <object> , but without success. Neither Dictionaries nor Lists accept anything like Dicti
我一直在寻找一种方法将各种类型的变量的引用保存到字典中,并与相应的键一起保存。 然后,我想修改变量的实例,通过字典的键来访问它的引用。 为了存储引用,我试图使用<object> ,但没有成功。 字典和列表都不能接受Dictionary<string, ref int> 。 下面的代码编译,但似乎只通过值更新变量。 任何想法或解决方法? 这是(测试)代码: class Test1 { IDictionary<string, object> MyDict = new
This question already has an answer here: Why is 0 < -0x80000000? 6 answers (-2147483648> 0) returns true in C++? 4 answers In C, -2147483648 is not an integer constant. 2147483648 is an integer constant, and - is just a unary operator applied to it, yielding a constant expression. The value of 2147483648 does not fit in an int (it's one too large, 2147483647 is typically the
这个问题在这里已经有了答案: 为什么是0 <-0x80000000? 6个答案 (-2147483648> 0)在C ++中返回true? 4个答案 在C中, -2147483648不是整数常量。 2147483648是一个整数常量,并且-只是一个应用于它的一元运算符,产生一个常量表达式。 2147483648的值不适合int (它太大了, 2147483647通常是最大的整数),因此整数常量的类型为long ,这会导致您观察到的问题。 如果您想提到int下限,请使用<limits.h
This question already has an answer here: sizeof() operator in if-statement 5 answers Why does this program gives false as output? if(sizeof(int) > -1) The reason is that sizeof returns size_t (unsigned), so -1 was converted to unsigned before comparing. According to the standard: 6.3.1.8 Usual arithmetic conversions .... Otherwise, if the operand that has unsigned integer type h
这个问题在这里已经有了答案: if-statement 5答案中的sizeof()运算符 为什么这个程序会输出错误? if(sizeof(int) > -1) 原因是sizeof返回size_t (无符号),所以在比较之前, -1被转换为无符号。 根据标准: 6.3.1.8通常的算术转换 .... 否则,如果具有无符号整数类型的操作数的级别大于或等于另一操作数的类型的级别,则具有有符号整数类型的操作数将转换为具有无符号整数类型的操作数的类型。 请注意
This question already has an answer here: void main() { if(sizeof(int) > -1) printf(“true”); else printf(“false”); ; [duplicate] 3 answers sizeof generates a size_t which is always positive. You are comparing it with -1 which is probably promoted in size_t which gave you a HUGE number, most likely greater than the size of an int. To make sure of it, try this: printf("%zun", sizeof(i
这个问题在这里已经有了答案: void main(){if(sizeof(int)> -1)printf(“true”); else printf(“false”); ; [重复] 3个答案 sizeof生成一个总是正数的size_t 。 你将它与-1进行比较,这可能是在size_t中提升的,它给了你一个巨大的数字,最可能大于int的大小。 为了确保它,试试这个: printf("%zun", sizeof(int)); printf("%zun", (size_t)(-1)); [编辑]:以下评论(有些已被删除),我确实确实sizeof
I recently came across some code that looked like: if(sizeof(var,2) == 4) { ... } (where var is a type) I was quite surprised to see what appeared to be two arguments to the sizeof operator. A quick scan of the ISO/ANSI C99 standard did not yield any secrets. I couldn't come up with any reading of the grammar that allowed a comma there. Searching Google Code, I was able to find an exa
我最近遇到了一些看起来像这样的代码: if(sizeof(var,2) == 4) { ... } (其中var是一个类型) 看到sizeof运算符似乎有两个参数,我感到非常惊讶。 对ISO / ANSI C99标准的快速扫描没有产生任何秘密。 我无法想出任何可以在那里得到逗号的语法。 搜索谷歌代码,我能够在一些PPC代码中找到这种语法的例子。 这是一些PPC特定的语法吗? 这是什么意思? 编辑:事实证明,我所看到的 - 以及链接的代码 - 是特定于WindR
This post is meant to be used as a FAQ regarding implicit integer promotion in C, particularly implicit promotion caused by the usual arithmetic conversions and/or the integer promotions. Example 1) Why does this give a strange, large integer number and not 255? unsigned char x = 0; unsigned char y = 1; printf("%un", x - y); Example 2) Why does this give "-1 is larger than 0"?
本文旨在用作关于C中隐式整数提升的常见问题解答,特别是由常规算术转换和/或整数提升引起的隐式提升。 例1) 为什么这会给出一个奇怪的大整数而不是255? unsigned char x = 0; unsigned char y = 1; printf("%un", x - y); 例2) 为什么这会给“-1大于0”? unsigned int a = 1; signed int b = -2; if(a + b > 0) puts("-1 is larger than 0"); 例3) 为什么改变在上面的例子类型short解决这一问题? unsigne
I'm studying the basic concepts of the C Programming Language on a website called TutorialsPoint. Examples of source code on this website can include a "try it" button that opens up an on-line c programming environment with an on-line c compiler (GNU GCC version 4.7.2). In one example the sizeof() function is demonstrated. Here is the source code. #include <stdio.h> #inclu
我正在研究名为TutorialsPoint的网站上的C编程语言的基本概念。 本网站上的源代码示例可以包含一个“尝试”按钮,该按钮通过一个在线c编译器(GNU GCC版本4.7.2)打开一个在线c编程环境。 在一个例子中,演示了sizeof()函数。 这是源代码。 #include <stdio.h> #include <limits.h> int main() { printf("Storage size for int : %d n", sizeof(int)); return 0; } 链接到课程:TutorialsPoint - C数