[开发工具]vscode编写c++文件——添加自定义库（ubuntu20.04）

环境：ubuntu20.04、vscode 1.70、g++ 9.4.0
项目结构如下：add.h和add.cpp是自定义的库

1. 把自定义的头文件放入c_cpp_properties.json 中的includePath中：
   

2. 将实现的库函数.cpp放入tasks.json，以便正常编译和调用（加在args里）：
   

3. 此外，为了编译单个文件，一次运行一个源程序，需要在tasks.json的args下设置为file：
   

4. 运行结果：
   
   

附录：

launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "g++ - Build and debug active file",
            "type": "cppdbg",
            "request": "launch",
            "program": "${fileDirname}/${fileBasenameNoExtension}",
            "args": [],
            "stopAtConnect": true,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "preLaunchTask": "C/C++: g++ build active file",
            "miDebuggerPath": "/usr/bin/gdb"
        }
    ]
}

tasks.json:

{
    "tasks": [
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",  /* 与launch.json文件里的preLaunchTask的内容保持一致 */
            "command": "/usr/bin/g++",    /*specifies the program to run;*/
            "args": [
                "-std=c++11",
                "-g",
                "${file}",   /* 编译单个文件 */
                //"${fileDirname}/*.cpp",  /* 编译多个文件 */
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}",  /* 输出文件路径 */
 
                /* 项目所需的头文件路径 */
                "-I","${workspaceFolder}/",
                "-I","/usr/local/include/",
                "-I","/usr/local/include/opencv4/",
                "-I","/usr/local/include/opencv4/opencv2",
                "-I","include",
                "./source/add.cpp",  /*库的实现，需要加，不然显示未定义*/
 
                /* 项目所需的库文件路径 */
                "-L", "/usr/local/lib",
 
                /* OpenCV的lib库 */
                "/usr/local/lib/libopencv_*",
 
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "detail": "Task generated by Debugger."
        }
    ],
    "version": "2.0.0"
}

c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**",
                "/usr/local/include/opencv4",
                "include"
            ],
            "defines": [],
            "compilerPath": "/usr/bin/gcc",
            "cStandard": "gnu11",
            "cppStandard": "gnu++14",
            "intelliSenseMode": "linux-gcc-x64"
        }
    ],
    "version": 4
}

main.cpp:

#include <opencv2/opencv.hpp>
#include <iostream>
#include "include/add.h"
 
using namespace std;
using namespace cv;
 
int main(int argc, char* argv[]) {
    // 测试自定义头文件
    int a = 5;
    int b = 6;
    cout << add(5, 6) << endl;
    

    // 测试opencv
    const char* imagename = "test.jpg";
    
    Mat img = imread(imagename, 1);
 
    if (img.empty()) {
        fprintf(stderr, "Can not load image %s\n", imagename);
        return -1;
    }
    imshow("image", img);
    
    waitKey();
    return 0;
}

如有不对的地方欢迎大佬们指出！