undefined reference to WinMain 16 codeblocks

Question

When I compile my secrypt cpp program  my compiler shows the error  undefined reference to WinMain 16   my code is as follows  secrypt h     ifndef SECRYPT H  define SECRYPT H  void jRegister      endif   secrypt cpp     include lt iostream gt   include lt string gt   include lt fstream gt   include lt cstdlib gt   include  secrypt h   using namespace std   void jRegister         ofstream outRegister   useraccount dat   ios  out        if    outRegister            cerr  lt  lt   File could not be opened   lt  lt  endl      exit  1         string a b c d      cout lt  lt  enter your username         cin gt  gt a      cout lt  lt  enter your password         cin gt  gt b      outRegister lt  lt a lt  lt     lt  lt b lt  lt endl      cout lt  lt  your account has been created        trial cpp   include lt iostream gt   include  secrypt h   using namespace std   int main         void jRegister         return 0      Here is the image of my error  errorimage  When I compile my trial cpp program  it compiles and opens the console  but didn t calls the function  Here is the image of the console screen of trial cpp program   o p screen Can anyone help me solving this

User · Answer

Well I know this answer is not an experienced programmer's approach and of an Old It consultant , but it worked for me .

the answer is "TRY TURNING IT ON AND OFF" . restart codeblocks and it works well reminds me of the 2006 comedy show It Crowd .

User · Answer

When there s no project  Code  Blocks only compiles and links the current file  That file  from your picture  is secrypt cpp  which does not have a main function  In order to compile and link both source files  you ll need to do it manually or add them to the same project    Contrary to what others are saying  using a Windows subsystem with main will still work  but there will be no console window   Your other attempt  compiling and linking just trial cpp  never links secrypt cpp  This would normally result in an undefined reference to jRegister    but you ve declared the function inside main instead of calling it  Change main to   int main         jRegister         return 0

User · Answer

I had the same error problem using Code Blocks rev 13 12  I may be wrong here since I am less than a beginner     My problem was that I accidentally capitalized  M  in Main   instead of ALL lowercase   main   - once corrected  it worked     I noticed that you have  int main    instead of  main      Is this the problem  or is it supposed to be that way   Hope I could help

User · Answer

I was interested in setting up graphics for Code Blocks when I ran into a this error   took me 2 hrs to solve it   I guess you need to have a bit of luck with this  In my case i just changed the order of contents in Settings menu- Compiler and Debugger- Global compiler settings- Linker settings- Other Linker Options  The working sequence is  -lmingw32 -lSDL -lSDLmain

User · Answer

You need to open the project file of your program and it should appear on Management panel  Right click on the project file  then select add file  You should add the 3 source code  secrypt h  secrypt cpp  and the trial cpp  Compile and enjoy  Hope  I could help you

User · Answer

Open the project you want to add it   Right click on the name  Then select  add in the active project  Then the cpp file will get its link to cbp

User · Answer

You should create a new project in Code  Blocks  and make sure it s  Console Application    Add your  cpp files into the project so they are all compiled and linked together

[c++] undefined reference to WinMain@16 (codeblocks)

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