int

问题 I'm trying to learn the benefits and shortcomings of different ways to get input from the console. I'm confused with scanf . Why do I need to use use &favNumber instead of favNumber ? I understand that &favNumber is the address location of favNumber , but why is it done this way? I feel like there's a type mismatch here where favNumber is an int and I'm telling scanf that it's a pointer to an int. I thought I wrapped my head around pointers but this is confusing me a bit. Any help would be

问题 I'm trying to learn the benefits and shortcomings of different ways to get input from the console. I'm confused with scanf . Why do I need to use use &favNumber instead of favNumber ? I understand that &favNumber is the address location of favNumber , but why is it done this way? I feel like there's a type mismatch here where favNumber is an int and I'm telling scanf that it's a pointer to an int. I thought I wrapped my head around pointers but this is confusing me a bit. Any help would be

问题 I'm new to the c language and used java before, so I'm not so familiar with some things... I want to read an indefinite number of integer until there's a new line. I know, that new line is ⁄n and I already have a code, so the integer are read until you type in a letter, but it doesn't stop, if there's a new line. #include <stdio.h> int main() { int i, numberOfNumbs=0,total=0,value, valsRead; float average; valsRead = scanf("%d",&value); while(valsRead>0) { numberOfNumbs++; total +=value;

问题 Today I came a cross this strange behaviour, could someone explain why it happens? var x = -1U; // When using -1UL it complains though. Console.WriteLine(x.GetType().Name); Console.WriteLine(x); Output: Int64 -1 MSDN says: If the literal is suffixed by U or u, it has the first of these types in which its value can be represented: uint, ulong. https://msdn.microsoft.com/en-us/library/aa664674%28v=vs.71%29.aspx 回答1: Your confusion stems from you interpreting this as the number -1 , followed by

问题 Today I came a cross this strange behaviour, could someone explain why it happens? var x = -1U; // When using -1UL it complains though. Console.WriteLine(x.GetType().Name); Console.WriteLine(x); Output: Int64 -1 MSDN says: If the literal is suffixed by U or u, it has the first of these types in which its value can be represented: uint, ulong. https://msdn.microsoft.com/en-us/library/aa664674%28v=vs.71%29.aspx 回答1: Your confusion stems from you interpreting this as the number -1 , followed by

问题 If I were to have the following list: lst = ['3', '7', 'foo', '2.6', 'bar', '8.9'] how would I convert all possible items into either ints or floats accordingly, to get lst = [3, 7, 'foo', 2.6, 'bar', 8.9] thanks in advance. 回答1: Loop over each item and make an attempt to convert. If the conversion fail then you know it's not convertible. def tryconvert(s): try: return int(s) except ValueError: try: return float(s) except ValueError: return s lst = ['3', '7', 'foo', '2.6', 'bar', '8.9']

问题 This question already has answers here : How do you specify a byte literal in Java? (6 answers) Closed 9 months ago . Explain me please, why, when I write 4 overloaded methods and call it => it chooses method with 'int' as default, but not 'byte', which is closer/better, because it can storage values from -127 to 128? class Main { public static void method(short s) { System.out.println("short"); } public static void method(byte b) { System.out.println("byte"); } public static void method(int

问题 I found a c implementaion of conio.h's getch(). Sadly it compiles with a comversion warning, and i don't know what i should do to solve it correctly. I found this link, but i don't know how to implement it. #include<termios.h> #include<unistd.h> #include<stdio.h> #include"getch.h" /* reads from keypress, doesn't echo */ int getch(void) { struct termios oldattr, newattr; int ch; tcgetattr( STDIN_FILENO, &oldattr ); newattr = oldattr; newattr.c_lflag &= ~( ICANON | ECHO ); tcsetattr( STDIN

问题 Here is the description about the algorithm/solution: Input: An array of ints and an array index Output: Kth largest element of the array Read the first K elements into an auxiliary array (the K largest found so far) Sort the K-element array Then: for each remaining element { if (if it is smaller than the smallest element of the aux. array) { throw it away } else { remove the current smallest element of the auxiliary array place the element into the correct position in the auxiliary array } }

问题 I have just made the following mistake: a = np.array([0,3,2, 1]) a[0] = .001 I was expecting 0 to be replaced by .001 (and the dtype of my numpy array to automatically switch from int to float). However, print (a) returns: array([0, 3, 2, 1]) Can somebody explain why numpy is doing that? I am confused because multiplying my array of integers by a floating point number will automatically change dtype to float: b = a*.1 print (b) array([0. , 0.3, 0.2, 0.1]) Is there a way to constrain numpy to