long-integer

问题 Im working with a embedded system and I need implement a way to convert long long to char. The problem is that I can not use sprintf in this system to do that, so im looking for alternative ways/functions to implement this. Suggestions of implementations for LongLongToChar function are welcome. 回答1: Google "itoa". There are many variations. Here's an example. char* itoa(int val, int base){ static char buf[32] = {0}; int i = 30; for(; val && i ; --i, val /= base) buf[i] = "0123456789abcdef"

问题 Me and my friend have just encountered a very weird issue with long long range. So basically, my computer has a 64bit processor but a 32 bit system on it. He has both 32 bit OS and CPU. First, we printfed sizeof(long long) . For both of us that was 8. Then we did this: long long blah = 1; printf ("%lld\n", blah<<40); For me this returns 1099511627776 (which is the correct result). For him it is 0. How is that possible? We both have the same sizeofs. Thanks in advance. EDIT: I compiled and ran

问题 I am developing a simple strangers chat application using long polling in MVC 2. Its works fine in my development machine if i am opening the application different browsers.. i mean if i loaded the application in IE and mozilla, it works fine if i took the appliction in two tabs of a browser (eg:IE) , the long polling are not firing from both tabs.. I mean, there is a start button to start chat which fire long polling. I can see it calling actions while debugging.. And my problem is, When i

问题 I'm working with numbers with tens of thousands of digits in python. The long type works beautifully in performing math on these numbers, however I'm unable to access the highest digits of these numbers in a sufficiently fast way. Note that I don't know exactly how many digits the number contains. The "highest digits" refers to the digits in the most significant place, the lowest digits can be accessed quickly using modulus. I can think of two ways to access these digits in python but they're

问题 I'm trying to run an ETL script using python and MySQLdb but I'm stuck with the results from my initial extract query. The types returned are all Long and Decimal when I want Int and Float. I've searched around for a few hours trying to get an answer to this without any success. database = MySQLdb.connect(host='db',user='user', passwd='password', db='db123') database_cursor = database.cursor() database_query = ("SELECT id, siteId, campaignId, hour, sum(impressions) AS impressions, " "sum

问题 The first line contains the value of the number 'N' followed by multiple lines. I could solve it in order of n^2 algorithm. Can someone suggest a better one? 回答1: You can use a minimum-heap and do it in O(n*(log(N))): heap = new Min-Heap(N) foreach line in text: if length(line) > heap.min(): heap.pop() heap.insert(line) foreach line in heap: print to stdout: line. it could also be done in O(n) using Select(N) (which selects the Nth number) followed by partition around the Nth number (which

问题 On 64-bit architectures, long int , according to gcc is at least an int64_t . On 32-bit, long int is at least int32_t . With Microsoft compilers, long is always an int32_t , regardless of 32/64-bit. Is there any way to: Force gcc to treat long as a int64_t, on 32bit? (for ease of testing) Force gcc to treat long as a int32_t on 64bit? (for compliance with MS's compiler). 回答1: Don't do this - use standard types such as int32_t , uint32_t , int64_t , uint64_t , etc from <stdint.h> rather than

问题 I have an 8-byte array in my application with this data: 00000133339e36a2 This data represents a long (on the platform the data was written in, on a Mac this would be a long long) with the value of 1319420966562 In the actual application this is a semi-randomized set of data, so the number will always be different. Therefore, I need to convert the byte array into a printable long long. I've tried casting the data directly into a long long, but I came up with 1305392 where I should have been

问题 I got a method that receives a long type parameher, and I try to call it passing 1 : contato.setId(1); And I receive this: The method setId(Long) in the type Contato is not applicable for the arguments (int). But, isn't 1 a long number as well? Isn't it inside the long scope ?? PS: Just to say, I solved the problem with this code: Integer y = 1; long x = y.longValue(); contato.setId(x); It's just a didatic question. 回答1: long is a datatype that contains 64bits (not to be confused with the

问题 Is this even possible? I don't even think it is, but I saw some code that was trying to do it. However, my unit tests showed that it was not working. I did see some similar thoughts: Converting GUID to Integer and Back Converting System.Decimal to System.Guid Just for clarification. The Guid creation is outside of my control; therefore, I can't just store the value in one of the Guid sets. 回答1: A GUID is 16 bytes long. A "long" is often understood as being 64 bits (i.e. 8 bytes) long. You