integer

问题 The shell script shown below will show a warning if the page takes more than 6 seconds to load. The problem is that the myduration variable is not an integer. How do I convert it to integer? myduration=$(curl http://192.168.50.1/mantisbt/view.php?id=1 -w %{time_total}) > /dev/null ; \ [[ $myduration -gt 1 ]] && echo "`date +'%y%m%d%H%M%S' It took more than 6 seconds to load the page http://192.168.50.1/mantisbt/view.php?id=1 回答1: Assuming $myduration is a decimal or integer $ myduration=6.5 $

问题 I am doing a factorial program with strings because i need the factorial of Numbers greater than 250 I intent with: string factorial(int n){ string fact="1"; for(int i=2; i<=n; i++){ b=atoi(fact)*n; } } But the problem is that atoi not works. How can i convert my string in a integer. And The most important Do I want to know if the program of this way will work with the factorial of 400 for example? 回答1: There's a web site that will calculate factorials for you: http://www.nitrxgen.net

问题 If you have a list of integers in python, say L = [4,8,12,24] , how can you compute their greatest common denominator/divisor (4 in this case)? 回答1: One way to do it is: import fractions def gcd(L): return reduce(fractions.gcd, L) print gcd([4,8,12,24]) 来源： https://stackoverflow.com/questions/3640955/computing-greatest-common-denominator-in-python

问题 I have a string that contains what ever the user has input string userstr = ""; cout << "Please enter a string "; getline (cin, userstr); The string is then stored in userstr, I then want the string to be stored in a integer array where each character is a different element in the array. I have created a dynamic array as the following: int* myarray = new int[sizeof(userstr)]; However how do I then get my string into that array? 回答1: You can access each element in your string using the []

问题 Please tell me how to convert bytes to NSInteger/int in objective-c in iPhone programming? 回答1: What do you mean by "Bytes"? If you want convert single byte representing integer value to int (or NSInteger) type, just use "=": Byte b = 123; NSInteger x; x = b; as Byte (the same as unsigned char - 1 byte unsigned integer) and NSInteger (the same as int - 4 bytes signed integer) are both of simple integer types and can be converted automatically. Your should read more about " c data types " and

问题 I want to know if it's possible to select incremented integer from mysql table? and if it does possible, how can I achieve that? My case is, I have a bunch of data and I need to do INSERT INTO newtable ... SELECT somefield FROM sometable . However, there is one field on newtable called counter that I need it in incremented integer, eg: row #1: counter=1 row #2: counter=2 row #3: counter=3 row #4: counter=4 row #5: counter=5 row #6: counter=6 ... and so on... I can do this using simple php

问题 I want to know if it's possible to select incremented integer from mysql table? and if it does possible, how can I achieve that? My case is, I have a bunch of data and I need to do INSERT INTO newtable ... SELECT somefield FROM sometable . However, there is one field on newtable called counter that I need it in incremented integer, eg: row #1: counter=1 row #2: counter=2 row #3: counter=3 row #4: counter=4 row #5: counter=5 row #6: counter=6 ... and so on... I can do this using simple php

问题 I want to split a 64bit integer into two 32bit integers: var bigInt = 0xffffff; var highInt = bigInt >> 8 // get the high bits 0xfff var lowInt = bigInt // cut of the first part (with &)? console.log(highInt); // 0xfff console.log(lowInt); // 0xfff // set them together again var reBigInt = (highInt << 8) + lowInt; Unfortunately neither getting the highInt nor getting the lowInt works... Could somebody give me the answer how I need to use the bitwise operators? regards 回答1: EDIT JavaScript

问题 Requirement: Convert input integer or decimal to an array and convert array of integers which may include a decimal to a number. Restriction: Do not use string methods or convert input or output to a string during the procedure (a self-imposed restriction followed throughout each version of the code composed). Context and use cases BigInt in available in some browsers, though not a BigDecimal . The conversion from integer or decimal to array and array to integer or decimal should be possible

问题 i'm trying to read contents of PNG file. As you may know, all data is written in a 4-byte manner in png files, both text and numbers. so if we have number 35234 it is save in this way: [1000][1001][1010][0010]. but sometimes numbers are shorter, so the first bytes are zero, and when I read the array and cast it from char* to integer I get wrong number. for example [0000] [0000] [0001] [1011] sometimes numbers are misinterpreted as negative numbers and simetimes as zero! let me give you an