请注意,我在Ubuntu 17.10上使用VS Code,并使用GCC编译器。
我在构建使用其他.ccp文件的简单程序时遇到了麻烦。我可能在这里缺少明显的东西,因为我对编程还不熟悉,但是我将解释到目前为止的工作。这使我无法继续学习我正在做的教程。
我编写了一个非常简单的程序来说明我的观点,如下所示。
#include <iostream> #include "Cat.h" using namespace std; int main () { speak(); return 0; }
#pragma once void speak();
#include <iostream> #include "Cat.h" using namespace std; void speak() { std::cout << "Meow!!" << std::endl; }
这个简单的程序在Codeblocks和Visual Studio Community 2017中均内置,没问题,我不知道要使其运行需要做什么。底部的此错误表明根本没有拾取Cat.ccp文件。如果要将定义从此Cat.ccp放到头文件中,则程序可以编译并运行良好,但是我需要利用该.ccp文件,因为我了解这是公认的分离代码的方法。我会注意到所有文件也都在同一文件夹中。
我知道我可能需要告诉VS Code在哪里寻找Cat.ccp文件,但是对我来说很奇怪,它在同一位置找到了标头。不过,在网上查看后,我一直在阅读,我可能需要在c_cpp_intellisense_properties.json中放置一个目录。这是我的样子。
{ "configurations": [ { "name": "Mac", "includePath": [ "/usr/include", "/usr/local/include", "${workspaceRoot}" ], "defines": [], "intelliSenseMode": "clang-x64", "browse": { "path": [ "/usr/include", "/usr/local/include", "${workspaceRoot}" ], "limitSymbolsToIncludedHeaders": true, "databaseFilename": "" }, "macFrameworkPath": [ "/System/Library/Frameworks", "/Library/Frameworks" ] }, { "name": "Linux", "includePath": [ "/usr/include/c++/7", "/usr/include/x86_64-linux-gnu/c++/7", "/usr/include/c++/7/backward", "/usr/lib/gcc/x86_64-linux-gnu/7/include", "/usr/local/include", "/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed", "/usr/include/x86_64-linux-gnu", "/usr/include", "/home/danny/Documents/C++_Projects/24_-_Classes/Cat.cpp", "${workspaceRoot}", "/home/danny/Documents/C++_Projects/24_-_Classes/", "/home/danny/Documents/C++_Projects/24_-_Classes/.vscode", "/home/danny/Documents/C++_Projects/24_-_Classes/.vscode/Cat.cpp" ], "defines": [], "intelliSenseMode": "clang-x64", "browse": { "path": [ "/usr/include/c++/7", "/usr/include/x86_64-linux-gnu/c++/7", "/usr/include/c++/7/backward", "/usr/lib/gcc/x86_64-linux-gnu/7/include", "/usr/local/include", "/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed", "/usr/include/x86_64-linux-gnu", "/usr/include", "${workspaceRoot}", "/home/danny/Documents/C++_Projects/24_-_Classes/", "/home/danny/Documents/C++_Projects/24_-_Classes/.vscode/Cat.cpp" ], "limitSymbolsToIncludedHeaders": true, "databaseFilename": "" } }, { "name": "Win32", "includePath": [ "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include", "${workspaceRoot}" ], "defines": [ "_DEBUG", "UNICODE" ], "intelliSenseMode": "msvc-x64", "browse": { "path": [ "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/include/*", "${workspaceRoot}" ], "limitSymbolsToIncludedHeaders": true, "databaseFilename": "" } } ], "version": 3 }
有一次,我在想,如果我需要在里面加上一个双指令告诉编译器建立在两个.ccp文件 tasks.json 但我没有设法弄清楚如何做到这一点,或者即使这是正确的方法。
{ // See https://go.microsoft.com/fwlink/?LinkId=733558 // for the documentation about the tasks.json format "version": "2.0.0", "tasks": [ { "label": "Build", "type": "shell", "command": "g++ -g /home/danny/Documents/C++_Projects/24_-_Classes/main.cpp -o Classes", "group": { "kind": "build", "isDefault": true }, "problemMatcher":"$gcc" } ] }
感谢任何帮助。而且,以防万一您想知道,我之所以不只是在Codeblocks或VSCommunity中完成本教程,是因为我想知道大多数情况下发生了什么。另外,我想让VS Code为我工作,因为到目前为止效果很好。
如果您有多个文件,而一个文件依赖cpp另一个文件,则需要告诉g++也对其进行编译,以便链接程序可以找到它。最简单的方法是:
cpp
$ g++ Cat.cpp main.cpp -o Classes
附带说明一下,您可能应该最小程度地-Wall,可能-Wextra和可能地使用警告进行编译-Wpedantic,以使您知道自己正在做的事情是否有问题。
-Wall
-Wextra
-Wpedantic