100. Clion中使用头文件和源文件坑

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Clion 中使用头文件定义类，源文件实现

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

CMakeLists.txt

  • 手动添加
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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)
  • 自动添加
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# 遍历项目根目录下所有的 .cpp 文件
file (GLOB files *.cpp)
foreach (file ${files})
    string(REGEX REPLACE ".+/(.+)\\..*" "\\1" exe ${file})
    add_executable (${exe} ${file})
    message (\ \ \ \ --\ src/${exe}.cpp\ will\ be\ compiled\ to\ bin/${exe})
endforeach ()

代码

ElemType.h

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#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

ElemType.cpp

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#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;
}

main.cpp

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#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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