byte

问题 I have an assignment to do, but I have no clue where to start. I am not expecting and definitely do not want answers in code. I would like some guidance as in what to do because I feel a bit lost. Pack and unpack variables into a byte . You need to store 4 different values in a byte. The values are: NAME RANGE BITS engine_on 0-1 1 gear_pos 0-4 3 key_pos 0-2 2 brake1 0-1 1 brake2 0-1 1 (LSB, Least significant bit ) Write a program bytess.c that takes 5 arguments (less or more should be treated

问题 is there a way in python to write less than 1 byte data even when I write the number 0 which represented in 1 bit the file size is 1(8 bits) byte I tried the struct module file.write(struct.pack('b',0)) array module import array data1=array.array('B') x=bin(0)[2:] data1.append(int(0,2)) f2=open('/root/x.txt','wb') data1.tofile(f2) 回答1: No you cannot write less than a byte. A byte is an indivisble amount of memory the computer can handle. The hardware is not equipped to handle units of data <1

问题 How do I split a ushort into two byte variables in C#? I tried the following (package.FrameID is ushort): When I try to calculate this with paper&pencil I get the right result. Also, if FrameID is larger than a byte (so the second byte isn't zero), it works. array[0] = (byte)(0x0000000011111111 & package.FrameID); array[1] = (byte)(package.FrameID >> 8); In my case package.FrameID is 56 and the result in array[0] is 16 instead of 56. How can I fix this? 回答1: 0x0000000011111111 is not a binary

问题 Consider a list contains data in byte (i.e ['\x03', '\x00', '\x32', ... ]) temp = b'' for c in field_data: temp += c print "%x" % ord(c) above code correctly concatenates all bytes into temp (byte string literal). But when I added this into element of dictionary, output was incorrect in some cases. testdic = {'dd':temp} print testdic For example, 0x0 0x0 0x0 0x0 0x0 0x0 0x33 0x32 are in list and first code show all bytes were correctly concatenated. But when I executed second code right after

问题 I have a function which extracts a file into a byte array (data). int contentLength = postedFile.ContentLength; byte[] data = new byte[contentLength]; postedFile.InputStream.Read(data, 0, contentLength); Later I use this byte array to construct an System.Drawing.Image object (where data is the byte array) MemoryStream ms = new MemoryStream(data); Image bitmap = Image.FromStream(ms); I get the following exception "ArgumentException: Parameter is not valid." The original posted file contained a

问题 I have uploaded an Image in to my database as byte[] and now im trying to display it out. There was an error - Argument Exception was unhandled by user code Parameter is not valid At this line newImage = System.Drawing.Image.FromStream(stream); Here is my codes for (int i = 0; i < topRatingList.Count; i++) { int commentRating = topRatingList[i].CommentRating; int drinkID = topRatingList[i].DrinkID; if (i == 0) { DrinkMenuDAO drink = DrinkMenuBLL.getDrinkMenu(drinkID); LinkButton1.Text = drink

问题 I have a data of a form: v = "\xc5\x84" This is a byte representation of an utf-8 encoded character "ń". How can I print >>ń<< using variable v? I'm using python 2.7.2 In original the variable v contained string: v = "\\xc5\\x84" (double backslashes) vs v = "\xc5\x84" (single backslashes) which is by itself valid utf-8 character. 回答1: Edit In my machine the output depends on the shell/python used, as shown below. As commented by Klaus a major actor here would be the locale setting in your

问题 I'm trying to do some conversions between float and unsigned char arrays (std::vector in this case) and i've run into some troubles. I've converted the vector of floats to unsigned char like this... vector<float> myFloats; myFloats.push_back(1.0f); myFloats.push_back(2.0f); myFloats.push_back(3.0f); const unsigned char* bytes = reinterpret_cast<const unsigned char*>(&floats[0]); vector<unsigned char> byteVec; for (int i = 0; i < 3; i++) byteVec.push_back(bytes[i]); I'm hoping i've done this

问题 I am a seasoned Python developer and have come to love a lot of its conveniences. I have actually known C# for some time but recently have gotten into some more advanced coding. What I'm wondering is if there's a way to "parse" a byte array in C# into a set of (differently sized) items. Imagine we have this: Python: import struct byteArray = "\xFF\xFF\x00\x00\x00\xFF\x01\x00\x00\x00" numbers = struct.unpack("<LHL",byteArray) print numbers[0] # 65535 print numbers[1] # 255 print numbers[2] # 1

问题 I'm trying to convert a HEX number into a short (2 Bytes) using C++ everything is OK except for one thing... signed conversion from short to Byte (last test) i found this question and couldn't really benefit from it: portable signed/unsigned byte cast,C++ here are my tests: // test 1 - positive B2Short (success) byte *b = new byte[2]; b[0] = 0x10; //low byte b[1] = 0x00; //heigh byte signed short test = 0; test = ByteToShort(b); cout << test << endl; // test 2 - negative B2Short (success) b[0