int32

问题 C#, Console Application, Virtual Studio 2015, Paralelles: Windows 8.1. The code is as follows: class txt_program { public void txt() { /* 0 */ int[] M_array_0 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* 1 */ int[] M_array_1 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* 2 */ int[] M_array_2 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; // etc. // the M matrix int[][] M = { M_array_0, M_array_1, M_array_2, M_array_3, M_array_4, M_array_5, M_array_6, M_array_7, M_array_8, M_array_9

问题 C#, Console Application, Virtual Studio 2015, Paralelles: Windows 8.1. The code is as follows: class txt_program { public void txt() { /* 0 */ int[] M_array_0 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* 1 */ int[] M_array_1 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* 2 */ int[] M_array_2 = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; // etc. // the M matrix int[][] M = { M_array_0, M_array_1, M_array_2, M_array_3, M_array_4, M_array_5, M_array_6, M_array_7, M_array_8, M_array_9

来源： https://stackoverflow.com/questions/30818474/why-am-i-printing-out-system-int32-instead-of-my-array-of-numbers

问题 No exception is thrown, function just halts at this statement: int productQuantity = Convert.ToInt32("1.00"); and returns. What am I doing wrong to convert this float to Int32 ? Note: I am running in a BackgroundWorkerThread . 回答1: An exception is being thrown in this case it's just not being surfaced in the debugger. This string is not in a format that is convertible to an Int32 type and hence throws and exception. You can verify this by wrapping it in a try/catch block if the IDE isn't

问题 The following code: foreach (DataRow fillRateDataRow in dtFillRateResults.Rows) { . . . var frbdbc = new FillRateByDistributorByCustomer { ShortName = fillRateDataRow["ShortName"].ToString(), Unit = fillRateDataRow["Unit"].ToString(), CustNumber = fillRateDataRow["Custno"].ToString(), MemberItemCode = fillRateDataRow["MemberItemCode"].ToString(), Qty = Convert.ToInt32(fillRateDataRow["Qty"]), QtyShipped = Convert.ToInt32(fillRateDataRow["QtyShipped"]), ShipVariance = fillRateDataRow[

问题 I would like to understand a strange behavior of python. Let us consider a matrix M with shape 6000 x 2000 . This matrix is filled with signed integers. I want to compute np.transpose(M)*M . Two options: When I do it "naturally" (i.e. without specifying any typing), numpy selects the type np.int32 and the operation takes around 150s. When I force the type to be np.float64 (using dtype=... ), the same operation takes around 2s. How can we explain this behavior ? I was naively thinking that a

问题 I saw in MSDN documents that the maximum value of Int32 is 2,147,483,647, hexadecimal 0x7FFFFFFF . I think, if it's Int32 it should store 32-bit integer values that finally should be 4,294,967,295 and hexadecimal 0xFFFFFFFF . My question is why Int32 stores 31-bit integer values? 回答1: It's because it's a signed integer. An unsigned 32-bit integer give you the value you expect. Check out this MSDN page - http://msdn.microsoft.com/en-us/library/exx3b86w(v=vs.80).aspx For a more in depth

问题 I have following code int varOut; int.TryParse(txt1.Text, out varOut); // Here txt1.Text = 4286656181793660 Here txt1.Text is the random 16 digit number generated by JavaScript which is an integer. But the above code always return false i.e. varOut value is always zero. What I am doing wrong here ? 回答1: The limit for int ( 32-bit integer) is -2,147,483,648 to 2,147,483,647 . Your number is too large. For large integer number such as your case, try to Parse using long.TryParse (or Int64

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . Looking at the msdn documentation for Convert.ToInt32() it states: If value is halfway between two whole numbers, the even number is

问题 I'm re-writing alibrary with a mandate to make it totally allocation free. The goal is to have 0 collections after the app's startup phase is done. Previously, there were a lot of calls like this: Int32 foo = Int32.Parse(ASCIIEncoding.ASCII.GetString(bytes, start, length)); Which I believe is allocating a string. I couldn't find a C# library function that would do the same thing automatically. I looked at the BitConverter class, but it looks like that is only if your Int32 is encoded with the