一.在相同文件夹下
在正常情况下,若同一文件夹下若头文件、源文件、和主要代码在同一文件夹下,则可以正常运行程序。
如图(此为Visual Studio 示例):
编译结果(无报错):
但在VScode中,同样的使用方式会产生报错。
如下:
main.c:
#include #include "myheadfile.h"int main(){ myprint("hello"); return 0;}
myheadfile.h:
#ifndef _MYHEADFILE_H_#define _MYHEADFILE_H_void myprint(char *);#endif
myheadfile.c:
#include #include "myheadfile.h"void myprint(char *s){ printf("%s",s); return 0;}
报错如下:
E:/1.Documents/VC_Code/text/main.c:6: undefined reference to `myprint'collect2.exe: error: ld returned 1 exit status
错误提示为未定义函数,由于函数定义在myheadflod.c中,所以我试着将主要代码更改为:
#include #include "myheadfile.h"#include "myheadfile.c" //新增一条引用源文件int main(){ myprint("hello"); return 0;}
此时编译通过且无报错
=========================================================================
二.在不同文件夹下
但是如果三个文件分别在不同文件夹呢?
试验运行后报错:
此时需要配置如下文件:
1.ctrl+shift+p ==> 输入task选择任务配置
2.在以下位置插入内容:
{ "tasks": [ { "type": "cppbuild", "label": "C/C++: gcc.exe 生成活动文件", "command": "E:\\2.VSCode\\mingw64\\bin\\gcc.exe", "args": [ "-fdiagnostics-color=always", "-g", "${file}", "-I","E:/1.Documents/VC_Code/text/inc", //在此插入:"-I","头文件路径", "-I","E:/1.Documents/VC_Code/text/scr", //在此插入:"-I","源文件路径", "-o", "${fileDirname}\\${fileBasenameNoExtension}.exe" ], "options": { "cwd": "${fileDirname}" }, "problemMatcher": [ "$gcc" ], "group": { "kind": "build", "isDefault": true }, "detail": "调试器生成的任务。" }, { "type": "cppbuild", "label": "C/C++: gcc.exe 生成活动文件", "command": "E:\\2.VSCode\\mingw64\\bin\\gcc.exe", "args": [ "-fdiagnostics-color=always", "-g", "${file}", "-o", "${fileDirname}\\${fileBasenameNoExtension}.exe" ], "options": { "cwd": "${fileDirname}" }, "problemMatcher": [ "$gcc" ], "group": "build", "detail": "编译器: E:\\2.VSCode\\mingw64\\bin\\gcc.exe" } ], "version": "2.0.0"}
其中 -I(大写i)表示你的头文件路径, -L 表示库文件路径,-l(小写L) 代表库文件
3.打开 c_cpp_properties.json(没有的话自行百度找一下怎么打开):
{ "configurations": [ { "name": "Win32", "includePath": [ "${default}", "${workspaceFolder}/**", "E:/1.Documents/VC_Code/PAT/inc", //在此插入这两行 "E:/1.Documents/VC_Code/PAT/src" //在此插入这两行 ], "defines": [ "_DEBUG", "UNICODE", "_UNICODE" ], "windowsSdkVersion": "10.0.19041.0", "compilerPath": "E:/2.VSCode/mingw64/bin/g++.exe", "cStandard": "gnu17", "cppStandard": "gnu++17", "intelliSenseMode": "windows-gcc-x64" } ], "version": 4}
在此编译,通过且没有报错: