int

问题 In one of the answers in Tips for golfing in C, I saw this code (ungolfed version): s[],t; main(c){ for(scanf("%*d "); ~(c=getchar()); s[t++]=c) putchar(s[t]); } I think that the above program exhibits UB (but who cares in code golf?). But the thing that I don't understand is the s[] in global scope. I know that when the type of a global variable isn't specified, it defaults to int . I created a small program which surprisingly compiles: #include <stdio.h> int s[]; int main(void) { printf(

问题 I am coding a basic frequency analisys of WAVE audio files, but I have trouble when it comes to convertion from WAVE frames to integer. Here is the relevant part of my code: import wave track = wave.open('/some_path/my_audio.wav', 'r') byt_depth = track.getsampwidth() #Byte depth of the file in BYTES frame_rate = track.getframerate() buf_size = 512 def byt_sum (word): #convert a string of n bytes into an int in [0;8**n-1] return sum( (256**k)*word[k] for k in range(len(word)) ) raw_buf =

问题 I am coding a basic frequency analisys of WAVE audio files, but I have trouble when it comes to convertion from WAVE frames to integer. Here is the relevant part of my code: import wave track = wave.open('/some_path/my_audio.wav', 'r') byt_depth = track.getsampwidth() #Byte depth of the file in BYTES frame_rate = track.getframerate() buf_size = 512 def byt_sum (word): #convert a string of n bytes into an int in [0;8**n-1] return sum( (256**k)*word[k] for k in range(len(word)) ) raw_buf =

问题 I am coding a basic frequency analisys of WAVE audio files, but I have trouble when it comes to convertion from WAVE frames to integer. Here is the relevant part of my code: import wave track = wave.open('/some_path/my_audio.wav', 'r') byt_depth = track.getsampwidth() #Byte depth of the file in BYTES frame_rate = track.getframerate() buf_size = 512 def byt_sum (word): #convert a string of n bytes into an int in [0;8**n-1] return sum( (256**k)*word[k] for k in range(len(word)) ) raw_buf =

问题 I have written a .obj parser in java to modelize 3D objects on iPhone. I would like to export the data as a binary file, which must be as small as possible. I have plenty of indices that would fit a unsigned short, but they are represented as int in java. I would like to use the ByteBuffer class to do the conversion just before writing the data in a file. I suppose I will have to manipulate bytes before pushing them into the ByteBuffer but I have no idea how to do so. Thank you in advance if

问题 I want to increment an Int? Currently I have written this : return index != nil ? index!+1 : nil Is there some prettier way to write this ? 回答1: For the sake of completeness, Optional has a map() method: /// If `self == nil`, returns `nil`. Otherwise, returns `f(self!)`. @warn_unused_result @rethrows public func map<U>(@noescape f: (Wrapped) throws -> U) rethrows -> U? Therefore index != nil ? index! + 1 : nil is equivalent to index.map { $0 + 1 } 回答2: You can call the advanced(by:) function

问题 I want to increment an Int? Currently I have written this : return index != nil ? index!+1 : nil Is there some prettier way to write this ? 回答1: For the sake of completeness, Optional has a map() method: /// If `self == nil`, returns `nil`. Otherwise, returns `f(self!)`. @warn_unused_result @rethrows public func map<U>(@noescape f: (Wrapped) throws -> U) rethrows -> U? Therefore index != nil ? index! + 1 : nil is equivalent to index.map { $0 + 1 } 回答2: You can call the advanced(by:) function

问题 This question already has answers here : What does the C++ standard state the size of int, long type to be? (24 answers) Closed 5 years ago . Reading the following resource it says the size of an int/pointer can vary depending on the compiler: http://www.c4learn.com/c-programming/c-size-of-pointer-variable/ Why is this? I understand C defines only the min and max number of what a type should hold, but why would one compiler choose to set for example int to 2 bytes and another at 4? What would

问题 This question already has answers here : What does the C++ standard state the size of int, long type to be? (24 answers) Closed 5 years ago . Reading the following resource it says the size of an int/pointer can vary depending on the compiler: http://www.c4learn.com/c-programming/c-size-of-pointer-variable/ Why is this? I understand C defines only the min and max number of what a type should hold, but why would one compiler choose to set for example int to 2 bytes and another at 4? What would

问题 I have the following procedure for converting a user supplied integer to a string. I'm pretty sure my algorithm is working fine for converting each digit of the integer to it's correct decimal ASCII value. However, I'm having difficulty then storing that digit into its correct place in the outString. I've set the direction flag using 'std', and I then use stosb to load the current, converted digit into the last byte in outString (read from back to front). However, this does not seem to work.