概述
问题
从一年前开始，我的VScode老是第一行头文件报错’iostream’ file not found，不能检查语法错误，但是又能运行代码，能运行出正确结果，就很迷。
作者在这个问题上，每次需要写c++代码的时候，就有半天一天时间搞这个，实在是血的教训（ vscode？？？狗都不用）。但是vscode简洁的功能，运行小代码挺方便的，也是不得不用。
关于不能检查语法错误
我的vscode settings.json文件里面莫名其妙写了这一行代码
"C_Cpp.errorSquiggles": "Disabled"
我竟然一直没发现是行代码搞的不能检查语法错误（生气 无语）。千万要删掉或注释掉这一行。
找不到头文件的解决方案
期间从网上找了很多种方法，都不能解决问题。最后发现要禁用拓展C/C++ Clang Command Adapter。不过要先确保配置的环境是正确的。
①配置好c++环境。网上搜搜就能找到。我的json文件在文章最后。
②尝试一个一个禁用插件。我的vscode禁用的这个插件就不会报错了。
有答主说是C/C++ GNU Global导致的，部分情况下，TSLint,C#插件, Cmake插件也可能导致这个报错。
所以如果环境配置没问题的话，碰到这种情况，优先考虑拓展的问题。一个一个禁用拓展，不断尝试。
解决问题
最后写代码的时候终于没有红线了。非常开心。
配置文件
c_cpp_properties.json
{
"configurations": [
{
"browse": {
"path": [
"${workspaceRoot}"
],
"databaseFilename": "",
"limitSymbolsToIncludedHeaders": true
},
"name": "windows-gcc-x64",
"includePath": [
"${workspaceFolder}/**",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include-fixed",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/backward",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/x86_64-w64-mingw32",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/include",
"H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"windowsSdkVersion": "10.0.19041.0",
"compilerPath": "H:\x86_64-8.1.0-release-win32-seh-rt_v6-rev0\mingw64\bin\gcc.exe",
"cStandard": "${default}",
"cppStandard": "${default}",
"intelliSenseMode": "windows-gcc-x64",
"compilerArgs": []
}
],
"version": 4
}
launch.json
{
"version": "0.2.0",
"configurations": [
{
"name": "(gdb) Launch", // 配置名称，将会在启动配置的下拉菜单中显示
"preLaunchTask": "g++.exe build active file", //和tasks中label保持一致
"type": "cppdbg", // 配置类型，这里只能为cppdbg
"request": "launch", // 请求配置类型，可以为launch（启动）或attach（附加）
"program": "${fileDirname}/${fileBasenameNoExtension}.exe", // 将要进行调试的程序的路径
"args": [], // 程序调试时传递给程序的命令行参数，一般设为空即可
"stopAtEntry": false, // 设为true时程序将暂停在程序入口处，一般设置为false
"cwd": "${workspaceFolder}", // 调试程序时的工作目录，一般为${workspaceFolder}即代码所在目录
"environment": [],
"externalConsole": false, // 调试时是否显示控制台窗口，一般设置为true显示控制台
"MIMode": "gdb", // gdb
"miDebuggerPath": "H:\x86_64-8.1.0-release-win32-seh-rt_v6-rev0\mingw64\bin\gdb.exe", // miDebugger的路径，注意这里要与MinGw的路径对应
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}
settings.json
{
"files.associations": {
"iostream": "cpp",
"ostream": "cpp",
"cstdlib": "cpp",
"algorithm": "cpp",
"iosfwd": "cpp",
"bitset": "cpp",
"*.tcc": "cpp",
"complex": "cpp",
"iomanip": "cpp",
"stack": "cpp",
"vector": "cpp",
"deque": "cpp",
"list": "cpp",
"string": "cpp",
"functional": "cpp",
"array": "cpp",
"atomic": "cpp",
"cctype": "cpp",
"cfenv": "cpp",
"charconv": "cpp",
"chrono": "cpp",
"cinttypes": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"codecvt": "cpp",
"condition_variable": "cpp",
"csetjmp": "cpp",
"csignal": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdint": "cpp",
"cstdio": "cpp",
"cstring": "cpp",
"ctime": "cpp",
"cuchar": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"forward_list": "cpp",
"unordered_map": "cpp",
"unordered_set": "cpp",
"exception": "cpp",
"iterator": "cpp",
"map": "cpp",
"memory": "cpp",
"memory_resource": "cpp",
"numeric": "cpp",
"optional": "cpp",
"random": "cpp",
"ratio": "cpp",
"regex": "cpp",
"set": "cpp",
"string_view": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"utility": "cpp",
"slist": "cpp",
"fstream": "cpp",
"future": "cpp",
"initializer_list": "cpp",
"istream": "cpp",
"limits": "cpp",
"mutex": "cpp",
"new": "cpp",
"scoped_allocator": "cpp",
"shared_mutex": "cpp",
"sstream": "cpp",
"stdexcept": "cpp",
"streambuf": "cpp",
"thread": "cpp",
"typeindex": "cpp",
"typeinfo": "cpp",
"valarray": "cpp",
"xhash": "cpp",
"xiosbase": "cpp",
"xlocale": "cpp",
"xlocmon": "cpp",
"xlocnum": "cpp",
"xloctime": "cpp",
"xmemory": "cpp",
"xstring": "cpp",
"xtr1common": "cpp",
"xtree": "cpp",
"xutility": "cpp",
"ios": "cpp",
"game.h": "c"
},
// "clang.cflags": [
// "H:/x86_64-8.1.0-release-win32-seh-rt_v6-rev0/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++"
// ],
// "C_Cpp.default.compilerPath": "H:\x86_64-8.1.0-release-win32-seh-rt_v6-rev0\mingw64\bin\g++.exe"
}
tasks.json
{
// See https://go.microsoft.com/fwlink/?LinkId=733558
// for the documentation about the tasks.json format
"version": "2.0.0",
"tasks": [
{
"label": "g++.exe build active file",
"type": "shell",
"command": "g++",
"args": [
"-g",
"${file}",
"-o",
"${fileDirname}\${fileBasenameNoExtension}.exe"
],
"group": {
"kind": "build",
"isDefault": true
}
}
]
}
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