• Clion 中使用头文件定义类，源文件实现

1. include什么

   导入头文件(.h)和源文件(.cpp)
   Note: 只导入 源文件（.cpp） 也可以

2. CMakeLists.txt

   1. 手动添加

      cmake_minimum_required(VERSION 3.15)
      project(HCpp)
      
      set(CMAKE_CXX_STANDARD 11)
      
      add_executable(HCpp main.cpp)
      add_executable(ElemType ElemType.cpp ElemType.h)
      

   2. 自动添加

      #if ($HEADER_COMMENTS)
      /**
      * Author: ${USER_NAME}
      * Date: ${DATE}
      * TODO: 
      * Describe: 
      #if ($ORGANIZATION_NAME && $ORGANIZATION_NAME != "")
      * Copyright (c) $YEAR ${ORGANIZATION_NAME}#if (!$ORGANIZATION_NAME.endsWith(".")).#end All rights reserved.
      #end
      */
      #end
      

• 代码

1. ElemType.h

   /**
    * Author: Dgimo
    * Date: 2020/4/1
    * TODO: 
    * Describe: 
    */
   
   #ifndef HCPP_ELEMTYPE_H
   #define HCPP_ELEMTYPE_H
   
   #include <iostream>
   
   class ElemType {
   public:
       int data;
   
       ElemType();
       ElemType(int);
       friend std::ostream &operator <<(std::ostream &, const ElemType &);
   };
   
   #endif //HCPP_ELEMTYPE_H
   

2. ElemType.cpp

   /**
    * Author: Dgimo
    * Date: 2020/4/1
    * TODO: 
    * Describe: 
    */
   
   #include "ElemType.h"
   
   ElemType::ElemType() {
       this->data = 0;
   }
   
   ElemType::ElemType(int data) {
       this->data = data;
   }
   
   std::ostream& operator <<(std::ostream &out, const ElemType &e)
   {
       out << e.data;
       return out;
   }
   

3. main.cpp

   #include <iostream>
   #include "ElemType.h"
   #include "ElemType.cpp"
   
   using  namespace std;
   

   int main() {
   ElemType e = ElemType(10);
   cout << e << endl;
   return 0;
   }

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