Tamale  Moses

Tamale Moses


Openapi Cpp: Longbridge OpenAPI SDK for C++

Longbridge OpenAPI SDK for C++

User Guide

Longbridge OpenAPI SDK offer to use your Auth to create HttpClient and WebSocketClient.

HttpClient has get, post, put, del method, and you can use it to call the API conveniently.

WebSocketClient has send_request method, and you can register the message callback and the WebSocket State callback. You can have the user-defined function to handle the push message and WebSocket State change.

Meanwhile the SDK offer the log utility, user can have custom log path, and default path is path /Longbridge OpenAPI, except macOS system's is $HOME/Library/Logs/Longbridge OpenAPI. The log file default is longbridge.log.

If you have any question about using the SDK, please raising an issue。


  • C++ compile (at least C++11 standard)
    • clang (MacOS)
    • gcc (Unix)
    • msvc (Windows only)
  • CMake build system
  • Protobuf installed


Download the SDK

# clone sdk repo
cd /your/path
git clone https://github.com/longbridgeapp//openapi-cpp.git
# init submodule about proto
cd openapi-cpp
git submodule update --init

NOTE: Use need know yourself dev environment, and select the suitable arch static lib.

Open the Longbridge OpenAPI official site, and get your App Key, App Secret, Access Token.

Unzip the downloaded static lib to the path openapi-cpp/lib.

And you can use the SDK's HttpClient and WebSocketClient develop yourself application.

Run Demo

Replacing the app_key, app_secret, access_token in demo/src/const/value.h as the value you get from forward step.

Clion user can open the project, and demo has three binary target, you can run directly.

Unix-like user else can run follow shell.

cd /path/to/lb-openapi-cpp
mkdir build
cmake ..

# run the binary
# cd demo
# ./http
# ./ws_test
# ./logger

Windows user can config cmake plugin in VS Code, press CMD + Shift + P open the command window, input CMake:Config, auto create the build directory. and the bottom button run the selected binary.

Other user can read the follow Fully Document to config project as yourself.

User Fully Document

Project Dir

 └─src -- demo src
    └─proto -- protobuf generate .cc/.h file
docs -- gendoc.sh will gen the doc in the directory
include -- SDK include file
lib -- User downloaded static lib
proto -- proto definition
src -- SDK cpp implementation

Project compose

SDK mostly contain:

  • HttpClient
  • WebSocketClient
  • Log utility
  • proto file
  • demo example

About Protobuf

proto directory submodule another repo, store the Protobuf Message definition from the site, demo/src/proto store the generated cpp from proto file. You can generate the cpp file by yourself.

Author: longbridgeapp
Source code: https://github.com/longbridgeapp/openapi-cpp
License:  MIT license


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Openapi Cpp: Longbridge OpenAPI SDK for C++
Tamale  Moses

Tamale Moses


How to Run C/C++ in Sublime Text?

C and C++ are the most powerful programming language in the world. Most of the super fast and complex libraries and algorithms are written in C or C++. Most powerful Kernel programs are also written in C. So, there is no way to skip it.

In programming competitions, most programmers prefer to write code in C or C++. Tourist is considered the worlds top programming contestant of all ages who write code in C++.

During programming competitions, programmers prefer to use a lightweight editor to focus on coding and algorithm designing. VimSublime Text, and Notepad++ are the most common editors for us. Apart from the competition, many software developers and professionals love to use Sublime Text just because of its flexibility.

I have discussed the steps we need to complete in this blog post before running a C/C++ code in Sublime Text. We will take the inputs from an input file and print outputs to an output file without using freopen file related functions in C/C++.

#cpp #c #c-programming #sublimetext #c++ #c/c++

Download Android SDK Manager and SDK Tools

In this tutorial, we’ll read about the Android SDK Manager. We will see what is SDK manager in Android and why and how it is important for Android. So, SDK stands for Software Development Kit, which is a collection of software tools required. SDK basically helps Android to download tools and recent versions of Android. Every time a new Android version is released, along with it is released an SDK corresponding to it. This SDK must be installed by the developers for the devices.
What is SDK Manager?
A Software development kit is a set of tools required for the development of applications for Android. It also ensures that the progress of App development goes as flat as pancakes. We need SDK irrespective of the language we are using. Android SDK comes wrapped up with the Android Studio these days. An Android SDK separates the tools, platforms and other components into packages. These can be downloaded from the SDK Manager.

#android tutorials #android sdk manager #android sdk manager download #android sdk tools #android studio sdk manager #sdk download #sdk manager #sdk tools

Dicey Issues in C/C++

If you are familiar with C/C++then you must have come across some unusual things and if you haven’t, then you are about to. The below codes are checked twice before adding, so feel free to share this article with your friends. The following displays some of the issues:

  1. Using multiple variables in the print function
  2. Comparing Signed integer with unsigned integer
  3. Putting a semicolon at the end of the loop statement
  4. C preprocessor doesn’t need a semicolon
  5. Size of the string matters
  6. Macros and equations aren’t good friends
  7. Never compare Floating data type with double data type
  8. Arrays have a boundary
  9. Character constants are different from string literals
  10. Difference between single(=) and double(==) equal signs.

The below code generates no error since a print function can take any number of inputs but creates a mismatch with the variables. The print function is used to display characters, strings, integers, float, octal, and hexadecimal values onto the output screen. The format specifier is used to display the value of a variable.

  1. %d indicates Integer Format Specifier
  2. %f indicates Float Format Specifier
  3. %c indicates Character Format Specifier
  4. %s indicates String Format Specifier
  5. %u indicates Unsigned Integer Format Specifier
  6. %ld indicates Long Int Format Specifier

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A signed integer is a 32-bit datum that encodes an integer in the range [-2147483648 to 2147483647]. An unsigned integer is a 32-bit datum that encodes a non-negative integer in the range [0 to 4294967295]. The signed integer is represented in twos-complement notation. In the below code the signed integer will be converted to the maximum unsigned integer then compared with the unsigned integer.

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#problems-with-c #dicey-issues-in-c #c-programming #c++ #c #cplusplus

Abdullah  Kozey

Abdullah Kozey


Unformatted input/output operations In C++

In this article, we will discuss the unformatted Input/Output operations In C++. Using objects cin and cout for the input and the output of data of various types is possible because of overloading of operator >> and << to recognize all the basic C++ types. The operator >> is overloaded in the istream class and operator << is overloaded in the ostream class.

The general format for reading data from the keyboard:

cin >> var1 >> var2 >> …. >> var_n;

  • Here, var1var2, ……, varn are the variable names that are declared already.
  • The input data must be separated by white space characters and the data type of user input must be similar to the data types of the variables which are declared in the program.
  • The operator >> reads the data character by character and assigns it to the indicated location.
  • Reading of variables terminates when white space occurs or character type occurs that does not match the destination type.

#c++ #c++ programs #c++-operator overloading #cpp-input-output #cpp-operator #cpp-operator-overloading #operators

Shaylee  Lemke

Shaylee Lemke


Introduction to the new Embedded C SDK for Azure IoT

In this video, we show the Public Preview of the new Azure SDK for Embedded C, designed to allow constrained devices to take advantage of Azure IoT services. We walk you through the sample code to explain how the Azure SDK for Embedded C works and how to get started.

#c #c# #c++ #programming-c