implementation

How to link multiple implementation files in C

由 落爺英雄遲暮 提交于 2019-11-26 17:47:07
I have a number of .c files, i.e. the implementation files say main.c A.c B.c Where functions from any of the files can call any function from a different files. My question being, do I need a .h i.e. header file for each of A and B's implementation where each header file has the definition of ALL the functions in A or B. Also, main.c will have both A.h and B.h #included in it? If someone can finally make it clear, also, how do I later compile and run the multiple files in the terminal. Thanks. Header contents The header A.h for A.c should only contain the information that is necessary for

OpenCV SURF function is not implemented

由 女生的网名这么多〃 提交于 2019-11-26 17:44:17
问题 When I try to run the sample find_obj.cpp or any OpenCV SURF program I get the following error in command prompt while executing the code. The project builds without errors and warnings. I am using VS2011 beta, OpenCV 2.4 and windows7. Error message: OpenCV Error: The function/feature is not implemented < OpenCV was built without SURF support> in unknown function,file ..\..\..\src\opencv\modules\legacy\src\features2d.cpp, line 77 I tried to build the OpenCV 2.4 again using Cmake and then

Conflicting implementations of trait in Rust

由 浪子不回头ぞ 提交于 2019-11-26 17:23:24
问题 I want to implement a custom trait for &'a str and for integer numbers up to i32 , but Rust does not allow me to: use std::convert::Into; pub trait UiId { fn push(&self); } impl<'a> UiId for &'a str { fn push(&self) {} } impl<T: Into<i32>> UiId for T { fn push(&self) {} } fn main() {} This fails to compile with the following error: error[E0119]: conflicting implementations of trait `UiId` for type `&str`: --> src/main.rs:11:1 | 7 | impl<'a> UiId for &'a str { | ------------------------- first

Simple Delegate Example?

由 别来无恙 提交于 2019-11-26 16:45:43
问题 Ok, I'm programming in objective-C and using Xcode. I have read through the documentation on Apple's website and understand what delegate's are but when I come to the part where it talks about how to actually implement delegate methods into code, I just become confused, especially when they say something like "now implement the delegate's method." Maybe it's just me, but I don't know exactly WHERE to implement the method (would the AppDelegate.h/.m file be the correct location in a simple

Why is the behavior of the modulo operator (%) different between C and Ruby for negative integers?

由 不想你离开。 提交于 2019-11-26 14:42:26
问题 I was running some code in here. I tried -40 % 3 . It gives me the output 2 . when I performed the same operation in C, I get: int i = (-40) % 3 printf("%d", i); output is -1 How are both languages performing the modulo operation internally? 回答1: Wiki says: Given two positive numbers , a (the dividend) and n (the divisor), a modulo n (abbreviated as a mod n) is the remainder of the Euclidean division of a by n . .... When either a or n is negative, the naive definition breaks down and

Gradle Implementation vs API configuration

由 霸气de小男生 提交于 2019-11-26 11:04:49
I'm trying to figure it out what is the difference between api and implementation configuration while building my dependencies. In the documentation, it says that implementation has better build time, but, seeing this comment in a similar question I got to wonder if is it true. Since I'm no expert in gradle, I hope someone can help. I've read the documentation already but I was wondering about a easy-to-understand explanation. MatPag Gradle compile keyword was deprecated in favor of the api and implementation keywords to configure dependencies. Using api is the equivalent of using the

How to link multiple implementation files in C

由 匆匆过客 提交于 2019-11-26 05:37:15
问题 I have a number of .c files, i.e. the implementation files say main.c A.c B.c Where functions from any of the files can call any function from a different files. My question being, do I need a .h i.e. header file for each of A and B\'s implementation where each header file has the definition of ALL the functions in A or B. Also, main.c will have both A.h and B.h #included in it? If someone can finally make it clear, also, how do I later compile and run the multiple files in the terminal.

Gradle Implementation vs API configuration

由 时光怂恿深爱的人放手 提交于 2019-11-26 03:27:33
问题 I\'m trying to figure it out what is the difference between api and implementation configuration while building my dependencies. In the documentation, it says that implementation has better build time, but, seeing this comment in a similar question I got to wonder if is it true. Since I\'m no expert in gradle, I hope someone can help. I\'ve read the documentation already but I was wondering about a easy-to-understand explanation. 回答1: Gradle compile keyword was deprecated in favor of the api
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