First commit

.gitignore

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+build

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.10)
+project(MyNewLibrary VERSION 1.0
+                  DESCRIPTION "CHOOSE YOUR DESCRIPTION")
+#add_subdirectory(project2)
+add_library(${PROJECT_NAME} src/add.c)
+target_include_directories(${PROJECT_NAME} PUBLIC include)
+#target_link_libraries(${PROJECT_NAME} PUBLIC yourlibrary)

include/add.h

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+#pragma once
+
+int add(int a,int b);

src/add.c

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+#include <add.h>
+int add(int a,int b)
+{
+    return a + b;
+}