cmake和vscode 下的cmake的使用详解（三）

 

第七讲：【实战】使用 VSCode 进行完整项目开发

案例：士兵突击

需求：

1. 士兵 许三多 有一把 枪 ，叫做 AK47

2. 士兵 可以 开火

3. 士兵 可以 给枪装填子弹

4. 枪 能够 发射 子弹

5. 枪 能够 装填子弹 —— 增加子弹数量

开发：

        开发枪类

        开发士兵类

7.1 合理设置项目目录

 

 

7.2 编写项目源文件

/include Gun.h

#pragma once
#include 
using namespace std;

class Gun {

public:
  Gun(string type) {
    this->_bullet_count = 0;
    this->_type = type;
  }

  void addBullet(int bullet_num);
  bool shoot();

private:
  int _bullet_count;
  string _type;
};

include/ Solider.h 

#pragma once
#include "Gun.h"
#include 
using namespace std;

class Solider {

public:
  Solider(string name);
  void addBulletToGun(int num);
  void addGun(Gun *ptr_gun);
  bool fire();
  ~Solider();

private:
  string _name;
  Gun *_ptr_gun;
};

/src Gunc.cpp

#include "../include/Gun.h"

void Gun::addBullet(int bullet_num) { this->_bullet_count += bullet_num; }

bool Gun::shoot() {

  if (this->_bullet_count <= 0) {
    cout << "there is no bullet" << endl;
    return false;
  }

  this->_bullet_count -= 1;
  cout<<"shoot successfully"<

/src Solider.cpp

#include "../include/Solider.h"

Solider::Solider(string name) {

  this->_name = name;
  this->_ptr_gun = nullptr;
}
void Solider::addBulletToGun(int num) { this->_ptr_gun->addBullet(num); }

bool Solider::fire() {
  this->_ptr_gun->shoot();
  return false;
}

void Solider::addGun(Gun *ptr_gun) { this->_ptr_gun = ptr_gun; }

Solider::~Solider() {

  if (this->_ptr_gun == nullptr) {
    return;
  } else {

    delete _ptr_gun;
    _ptr_gun = nullptr;
  }
}

7.3 编写CMakeLists.txt构建项目编译规则

        

cmake_minimum_required(VERSION 3.0)
project(soliderFile)
#头文件
# include_directories(include)
include_directories(${CMAKE_SOURCE_DIR}/include)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")

set(CMAKE_BUILD_TYPE Debug)

add_executable(my_cmake_main main.cpp src/Gun.cpp src/Solider.cpp)

7.4 使用外部构建，手动编译CMake项目

        mkdir build ->cd build -> cmake .. -> make

7.5 配置VSCode的json文件并调试项目

launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [

        {
            "name": "g++ - Build and debug active file",
            "type": "cppdbg",
            "request": "launch",

            //绝对路径最重要。
            "program": "${workspaceFolder}/self_study2/7/build/my_cmake_main",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },

                {
                    "description": "Set Disassembly Flavor to Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ],

            //通过这个语句调用task.json 语法。
            "preLaunchTask": "Build",

            "miDebuggerPath": "/usr/bin/gdb"
        }
    ]
}

tasks.json

{   
    "version": "2.0.0",
    "options": {
        "cwd": "${workspaceFolder}/self_study2/7/build"
    },
    "tasks": [
        {
            "type": "shell",
            "label": "cmake",
            "command": "cmake",
            "args": [
                ".."
            ]
        },
        {
            "label": "make",
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "command": "make",
            "args": [

            ]
        },
        {
            "label": "Build",
			"dependsOrder": "sequence", // 按列出的顺序执行任务依赖项
            "dependsOn":[
                "cmake",
                "make"
            ]
        }
    ]

}