Create stub files for c and cpp lanaguegs (#1)

Author: Yucong Sun

.gitignore

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+# idea
+/.idea
+
+# cmake stuff
+cmake-build-*

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+
+project(libra-client-dev)
+
+add_subdirectory(c)
+add_subdirectory(cpp)

c/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+
+project(libra-client-c-dev)
+
+set(CMAKE_C_STANDARD 11)
+
+add_executable(c-client main.c)

c/main.c

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+#include <stdio.h>
+
+int main() {
+    fprintf(stdout, "it works!");
+}

cpp/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+
+project(libra-client-cpp-dev)
+
+set(CMAKE_CXX_STANDARD 11)
+
+add_executable(cpp-client main.cc)

cpp/main.cc

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+#include <iostream>
+
+int main() {
+    std::cout << "it works!";
+}

python/.gitignore

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+*.pyc