integer

问题 Assuming that uint is the largest integral type on my fixed-point platform, I have: uint func(uint a, uint b, uint c); Which needs to return a good approximation of a * b / c . The value of c is greater than both the value of a and the value of b . So we know for sure that the value of a * b / c would fit in a uint . However, the value of a * b itself overflows the size of a uint . So one way to compute the value of a * b / c would be: return a / c * b; Or even: if (a > b) return a / c * b;

问题 I need to store a very large number as an integer in a C program, unsigned long int is still too small, I need a very large data type that will still work with the modulo operator (%). 回答1: There are several libraries that can do this GMP OpenSSL's BN If you need it for cryptographic purposes (e.g. RSA as hinted by your need of modulo arithmetic), OpenSSL BN is ideally suited 回答2: I just want to throw in another library to solve this problem, which I just finished: kmbint It is more

问题 I need to store a very large number as an integer in a C program, unsigned long int is still too small, I need a very large data type that will still work with the modulo operator (%). 回答1: There are several libraries that can do this GMP OpenSSL's BN If you need it for cryptographic purposes (e.g. RSA as hinted by your need of modulo arithmetic), OpenSSL BN is ideally suited 回答2: I just want to throw in another library to solve this problem, which I just finished: kmbint It is more

问题 I want the country codes are integer that input by the user. I want an error message to be show when user inputs a code which is not an integer. How can I do this? The program is to ask user to enter country name and country code. In which user will input the country code. But if user inputs a character I want a message to be shown saying Invalid Input. System.out.println("Enter country name:"); countryName = in.nextLine(); System.out.println("Enter country code:"); int codeNumber = in

问题 I need to convert a binary input into a decimal integer. I know how to go from a decimal to a binary: n = int(raw_input('enter a number: ')) print '{0:b}'.format(n) I need to go in the reverse direction. My professor said that when he checks our code, he is going to input 11001 , and he should get 25 back. I've looked through our notes, and I cannot figure out how to do this. Google and other internet resources haven't been much help either. The biggest problem is that we are not allowed to

问题 I need to convert a binary input into a decimal integer. I know how to go from a decimal to a binary: n = int(raw_input('enter a number: ')) print '{0:b}'.format(n) I need to go in the reverse direction. My professor said that when he checks our code, he is going to input 11001 , and he should get 25 back. I've looked through our notes, and I cannot figure out how to do this. Google and other internet resources haven't been much help either. The biggest problem is that we are not allowed to

问题 I need to convert a binary input into a decimal integer. I know how to go from a decimal to a binary: n = int(raw_input('enter a number: ')) print '{0:b}'.format(n) I need to go in the reverse direction. My professor said that when he checks our code, he is going to input 11001 , and he should get 25 back. I've looked through our notes, and I cannot figure out how to do this. Google and other internet resources haven't been much help either. The biggest problem is that we are not allowed to

问题 In Python, I see people creating dictionaries like this: d = dict( one = 1, two = 2, three = 3 ) What if my keys are integers? When I try this: d = dict (1 = 1, 2 = 2, 3 = 3 ) I get an error. Of course I could do this: d = { 1:1, 2:2, 3:3 } which works fine, but my main question is this: is there a way to set integer keys using the dict() function/constructor? 回答1: Yes, but not with that version of the constructor. You can do this: >>> dict([(1, 2), (3, 4)]) {1: 2, 3: 4} There are several

问题 In Python, I see people creating dictionaries like this: d = dict( one = 1, two = 2, three = 3 ) What if my keys are integers? When I try this: d = dict (1 = 1, 2 = 2, 3 = 3 ) I get an error. Of course I could do this: d = { 1:1, 2:2, 3:3 } which works fine, but my main question is this: is there a way to set integer keys using the dict() function/constructor? 回答1: Yes, but not with that version of the constructor. You can do this: >>> dict([(1, 2), (3, 4)]) {1: 2, 3: 4} There are several

问题 I have this class to get data from Firestore: struct Spty: Identifiable{ var id: String var spty: String var r: NSNumber var g: NSNumber var b: NSNumber } class SptyViewModel: NSObject, ObservableObject{ @Published var specialities = [Spty]() @Published var search = "" func fetchData(){ let db = Firestore.firestore() db.collection("specialities").addSnapshotListener { (querySnapshot, error) in guard let documents = querySnapshot else {return } self.specialities = documents.documents