Simulink Code Generation build error question

I took Embedded coder generation course and I am practicing course example chapter 3.

I added to 1 line below and builded but errors happened!

What is the problem? I just followed the course textbook!

Let me know what should I do?

Thank you!

int_T main(int_T argc, const char *argv[])
{
  /* Unused arguments */
  (void)(argc);
  (void)(argv);

    int_T i; //<-------- 1 line added

    /* Initialize model */
    iir_external_initialize();

    /* Attach rt_OneStep to a timer or interrupt service routine with
     * period 0.01 seconds (the model's base sample time) here.  The
     * call syntax for rt_OneStep is
     *
     *  rt_OneStep();
     */
    printf("Warning: The simulation will run forever. "
           "Generated ERT main won't simulate model step behavior. "
           "To change this behavior select the 'MAT-file logging' option.\n");
    fflush((NULL));
    while (rtmGetErrorStatus(iir_external_M) == (NULL)) {
      /*  Perform other application tasks here */
    }

    /* Disable rt_OneStep() here */

    /* Terminate model */
    iir_external_terminate();
    return 0;
  }

===========================================================================================================
### Generated code for 'iir_external' is up to date because no structural, parameter or code replacement library changes were found.
### Using toolchain: Microsoft Visual C++ 2008 v9.0 | nmake (32-bit Windows)
### 'C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw\iir_external.mk' is up to date
### Building 'iir_external': nmake -f iir_external.mk all
C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw>call "C:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\vsvars32.bat"  
Setting environment for using Microsoft Visual Studio 2008 x86 tools. 

C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw>cd .  

C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw>if "" == "" (nmake -f iir_external.mk all )  else (nmake -f iir_external.mk  )
Microsoft(R) Program Maintenance Utility 버전 9.00.21022.08 
Copyright (c) Microsoft Corporation. All rights reserved. 

  cl -c -DCRTAPI1=_cdecl -DCRTAPI2=_cdecl -nologo -GS -D_X86_=1  -DWIN32 -D_WIN32 -W3 -D_WINNT -D_WIN32_WINNT=0x0500 -DNTDDI_VERSION=0x05000000 -D_WIN32_IE=0x0500 -DWINVER=0x0500  -D_MT -MT /wd4996 /fp:precise  /Od /Oy- -DONESTEPFCN=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DTID01EQ=0 -DMODEL=iir_external -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -Fo"ert_main.obj" "C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw\ert_main.c"
ert_main.c
C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw\ert_main.c(76) : error C2143: 구문 오류 : ';'이(가) '형식' 앞에 없습니다. 
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.EXE"' : '0x2' 반환 코드입니다. 
Stop. 

C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw>echo The make command returned an error of 2  
The make command returned an error of 2 

C:\class\coursefiles\slec\chapter03\iir_external_ert_rtw>An_error_occurred_during_the_call_to_make 
'An_error_occurred_during_the_call_to_make'은(는) 내부 또는 외부 명령, 실행할 수 있는 프로그램, 또는 
배치 파일이 아닙니다.

============================================================================================================

Answer 1

[Walter Roberson]

This is a C++ question, not a MATLAB question.

The error message is that you are missing a ';' before a type on line 76 of ert_main.c . You do not appear to have 76 lines in the code you show us.

Other material suggests the error message is generated if you attempt to declare a variable after you have an executable statement. See https://msdn.microsoft.com/en-us/library/0afb82ta.aspx

In particular, your line

      int_T i; //<-------- 1 line added

is after the lines

(void)(argc);

which is an executable line. You need to move your declaration to before that line. Or you need to upgrade to a newer C++ compiler.