Visual c can t open include file iostream

Question

I am new to c    I just started  I tried a code on visual c   2010 Express version but i got the following code error message    ------ Build started  Project  abc  Configuration  Debug Win32 ------   ugo cpp c  users castle documents visual studio 2010 projects abc abc ugo cpp 3   fatal error C1083  Cannot open include file   iostream   No such file or directory            Build  0 succeeded  1 failed  0 up-to-date  0 skipped              This is the code     first cpp -- displays a message    include  lt iostream gt       a PREPROCESSOR directive  int main void            function header                  start of a function body   using namespace std    cout  lt  lt   Come up and C   me sometime  n       message      start a new line   cout  lt  lt   Here is the total  1000 00 n     cout  lt  lt   Here we go  n     return 0

User · Answer

You are more than likely missing   IncludePath  within Properties- VC   Directories- Include Directories  Adding this should make iostream and others visible again  You probably deleted it by mistake while setting up your program

User · Answer

If you created an environment variable with the name IncludePath  try renaming it to something else  This name will override   IncludePath  inside project properties

User · Answer

If your include directories are referenced correctly in the VC   project property sheet  -  Configuration Properties -  VC   directories- Include directories The path is referenced in the macro    VC IncludePath  In my VS 2015 this evaluates to    C  Program Files  x86  Microsoft Visual Studio 14 0 VC include   using namespace std   include  lt iostream gt     That did it for me

User · Answer

Replace    include  lt iostream h gt    with  using namespace std    include  lt iostream gt

User · Answer

quick fix for small programs   add   include  lt cstdlib gt

User · Answer

first cpp -- displays a message    include  lt iostream gt       a PREPROCESSOR directive using namesapce std  int main             function header                  start of a function body      using namespace std    cout  lt  lt   Come up and C   me sometime  n       message      start a new line   cout  lt  lt   Here is the total  1000 00 n     cout  lt  lt   Here we go  n     return 0

User · Answer

I got this error when I created an  Empty  console application in Visual Studio 2015   I re-created the application  leaving the  Empty  box unchecked  it added all of the necessary libraries

User · Answer

It is possible that your compiler and the resources installed around it were somehow incomplete  I recommend re-installing your compiler  it should work after that

User · Answer

Microsoft Visual Studio is funny when your using the installer you MUST checkbox a-lot of options to bypass the  netframework somewhat  to make more c   instead of c sharp applications  such as the clr options under dekstop development    in visual studio installer     difference is c   win32 console project or a  c   CLR console project   So whats the difference  Well i m not going to list all of the files CLR includes but since most good c   kernals are in linux    so CLR allows you to bypass a-lot of the windows  netframework b c visual studio was really meant for you to make apps in C sharp   Heres a C   win32 console project    include  stdafx h   include  lt iostream gt  using namespace std  int main      cout lt  lt  Hello World  lt  lt endl  return 0      Now heres a c   CLR console project    include  stdafx h   using namespace System   int main array lt System  String   gt   args    Console  WriteLine  Hello World    return 0      Both programs do the same thing      CLR just looks more frameworked class overloading methodology so microsoft can great it s own vast library you should familiarize yourself w  if so inclined   https   msdn microsoft com en-us library 2e6a4at9 aspx  other things you ll learn from debugging to add for error avoidance   ifdef  MRC VER  define  CRT SECURE NO WARNINGS  endif

User · Answer

Some things that you should check    Check the include folder in your version of VS  in  C  Program Files Microsoft Visual Studio xx x VC include  check for the file which you are including  iostream  make sure it s there   Check your projects Include Directories in  lt Project Name gt   gt  Properties  gt  Configuration Properties  gt  VC   Directories  gt  Include Directories -  it should look like this    VCInstallDir include   VCInstallDir atlmfc include   WindowsSdkDir include   FrameworkSDKDir  include   Make sure that you selected the correct project for this code  File  gt  New  gt  Project  gt  Visual C    gt  Win32 Console Application  Make sure that you don t have  lt iostream h gt  anywhere in your code files  VS doesn t support that  in the same project  check your other code files   cpp and  h files for  lt iostream h gt  and remove it   Make sure that you don t have more than one main   function in your project code files  in the same project  check your other code files   cpp and  h files for the main   function and remove it or replace it with another name     Some things you could try building with    Exclude using namespace std  from your main   function and put it after the include directive  Use std  cout without using namespace std

User · Answer

I had this exact same problem in VS 2015  It looks like as of VS 2010 and later you need to include  include  stdafx h  in all your projects    include  stdafx h   include  lt iostream gt  using namespace std    The above worked for me  The below did not    include  lt iostream gt  using namespace std    This also failed    include  lt iostream gt  using namespace std   include  stdafx h

User · Answer

Make sure you have Desktop Development with C   installed  I was experiencing the same problem because I only had Universal Windows Platform Development installed

User · Answer

In my case  my VS2015 installed without select C   package  and VS2017 is installed with C   package  If I use VS2015 open C   project will show this error  and using VS2017 will be no error

[c++] Visual c++ can't open include file 'iostream'

Examples related to c++