Ошибка компилятора c2371 - Не ошибается лишь тот, кто ничего не делает!

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description	title	ms.date	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: Compiler Error C2371	Compiler Error C2371	11/04/2016	C2371	C2371	d383993d-05ef-4e35-8129-3b58a6f7b7b7

Compiler Error C2371

‘identifier’ : redefinition; different basic types

The identifier is already declared.

The following sample generates C2371:

// C2371.cpp
int main() {
   int i;
   float i;   // C2371, redefinition
   float f;   // OK
}

Источник

I have the following code:

#include <stdio.h>
#include <stdlib.h>

// helping
void sortint(int numbers[], int array_size)
{
  int i, j, temp;

  for (i = (array_size - 1); i > 0; i--)
  {
    for (j = 1; j <= i; j++)
    {
      if (numbers[j-1] > numbers[j])
      {
        temp = numbers[j-1];
        numbers[j-1] = numbers[j];
        numbers[j] = temp;
      }
    }
  }
}

// exer1 - A

void sort(int** arr, int arrsize) {
    int i = 0;
    // sort....
    for(; i < arrsize; ++i) {
        sortint((*(arr+i))+1,  **(arr+i));
    }
}

// Exer1 - B

void print(int** arr, int arrsize) {
    int i = 0, j, size, *xArr;
    for(; i < arrsize; ++i) {
        size = **(arr+i);
        xArr = *(arr+i);
        printf("size: %d: ", size);
        // print elements
        for(j = 1; j <= size; ++j) printf("[%d], ", *(xArr+j));
        printf("n");
    }
}

// Exer2:

void exera() {
    int* ptr = (int*)malloc(sizeof(int));
    if(!ptr) exit(-1);
    eb(ptr);
    free(ptr);
}

void eb(int* ptr) {
    int* arr = (int*) malloc(sizeof(int) * (*ptr));
    int i = 0;
    for(; i < *ptr; ++i) scanf("%d", arr+i);
    ec(arr, *ptr);
}

void ec(int* arr, int size) {
    int i;
    sortint(arr, size);
    for(i = 0; i < size; ++i) printf("[%d], ", *(arr+i));
}

int main() {
    // Exer1:
    int a[] = {4,3,9,6,7};
    int b[] = {3,2,5,5};
    int c[] = {1,0};
    int d[] = {2,1,6};
    int e[] = {5,4,5,6,2,1};
    int* list[5] = {a,b,c,d,e};
    sort(list, 5); // A
    print(list, 5); // B
    printf("nnnnn");
    // Exer2:
    exera();
    fflush(stdin);
    getchar();
    return 0;
}

I get these errors:

Error   2   error C2371: 'eb' : redefinition; different basic types
source.c    56

Error   4   error C2371: 'ec' : redefinition; different basic types 
source.c    63

Warning 1   warning C4013: 'eb' undefined; assuming extern returning int    
source.c    52

Warning 3   warning C4013: 'ec' undefined; assuming extern returning int    
source.c    60

I tried to change function names — for nothing.

Why is that error is being shown? I’m using Visual C++ Express 2010.

Источник

void aboutH() {
    printf("Information on hard disks");
    int j;
    _int64 FreeBytesAvailable;
    _int64 TotalNumberOfBytes;
    _int64 TotalNumberOfFreeBytes;
    LPCWSTR disk = L"I:";
    LPCWSTR diski[26] = { L"A:",L"B:",L"C:",L"D:",L"E:",L"F:",L"G:",L"H:",L"I:",L"J:",L"K:",L"L:",L"M:",L"N:"
        ,L"O:",L"P:",L"Q:",L"R:",L"S:",L"T:",L"U:",L"V:",L"W:",L"X:",L"Y:",L"Z:" };
    for (j = 0; j<26; j++)
    {
        TotalNumberOfBytes = NULL;
        TotalNumberOfFreeBytes = NULL;
        FreeBytesAvailable = NULL;
        GetDiskFreeSpaceEx(diski[j],
            (PULARGE_INTEGER)&FreeBytesAvailable,
            (PULARGE_INTEGER)&TotalNumberOfBytes,
            (PULARGE_INTEGER)&TotalNumberOfFreeBytes);
        if (GetDriveType(diski[j]) == DRIVE_FIXED)
        {
            if (TotalNumberOfBytes != 0) {
                printf("%s: ", diski[j]);
 
                
                printf("Total Memory %lf Gb, ", (long double)TotalNumberOfBytes / 1024 / 1024 / 1024);
                printf("Free %lf Gbn", (long double)TotalNumberOfFreeBytes / 1024 / 1024 / 1024);
            }
            else {
                printf("%s: ", diski[j]);
 
            
 
                printf("inactive diskn");
            }
        }
        else
        {
            continue;
        }
    }
    _getch();
    fMenu();
}

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I am getting C++ Compiler error C2371 when I include a header file that itself includes odbcss.h. My project is set to MBCS.

C:Program FilesMicrosoft SDKsWindowsv6.0Aincludeodbcss.h(430) :
error C2371: ‘WCHAR’ : redefinition; different basic types 1>
C:Program FilesMicrosoft SDKsWindowsv6.0Aincludewinnt.h(289) :
see declaration of ‘WCHAR’

I don’t see any defines in odbcss.h that I could set to avoid this. Has anyone else seen this?

Vadim Kotov

8,0448 gold badges48 silver badges62 bronze badges

asked Sep 3, 2008 at 17:08

Brian StewartBrian Stewart

9,09711 gold badges53 silver badges66 bronze badges

There are a half-dozen posts on various forums around the web about this — it seems to potentially be an issue when odbcss.h is used in the presence of MFC. Most of the answers involve changing the order of included headers (voodoo debugging). The header that includes odbcss.h compiles fine in it’s native project, but when it is included in a different project, it gives this error. We even put it in the latter project’s stdafx.h, right after the base include for MFC, and still no joy. We finally worked around it by moving it into a cpp file in the original project, which does not use MFC (which should have been done anyway — but it wasn’t our code). So we’ve got a work-around, but no real solution.

answered Sep 3, 2008 at 19:04

Brian StewartBrian Stewart

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This error happens when you redeclare a variable of the same name as a variable that has already been declared. Have you looked to see if odbcss.h has declared a variable you already have?

answered Sep 3, 2008 at 17:19

Craig HCraig H

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does this help?

http://bytes.com/forum/thread602063.html

Content from the thread:

Bruno van Dooren [MVP VC++] but i know the solution of this problem.
it solves by changing project setting of «Treat wchar_t as Built-in
Type» value «No (/Zc:wchar_t-)». But I am using «Xtreme Toolkit
Professional Edition» for making good look & Feel of an application,
when i fix the above problem by changing project settings a new
linking errors come from Xtreme Toolkit Library. So what i do to fix
this problem, in project setting «Treat wchar_t as Built-in Type»
value «yes» and i wrote following statements where i included wab.h
header file. You can change that setting on a per-codefile basis so
that only specific files are compiled with that particular setting. If
you can solve your problems that way it would be the cleanest
solution.

#define WIN16

#include "wab.h"

#undef WIN16

and after that my project is working fine and all the things related to WAB is also working fine. any one guide me, is that the right way
to solve this problem??? and, will this have any effect on the rest of
project?? I wouldn’t worry about it. whatever the definition, it is a
16 bit variable in both cases. I agree that it isn’t the best looking
solution, but it should work IF WIN16 has no other impact inside the
wab.h file.

—

Kind regards, Bruno van Dooren bruno_nos_pam_van_dooren@hotmail.com
Remove only «_nos_pam»

answered Sep 3, 2008 at 17:52

John BokerJohn Boker

82.3k17 gold badges96 silver badges130 bronze badges

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Remove From My Forums

Question
Hello:

I am by no means a VC++ guru, so please be patient with me.

I have inherited a project coded in C++ that was originally compiled using VS2003, and I am now trying to convert it so that I can work on it in VS2008 Pro.

The conversion process goes smooth. I get no errors.

However, when I try to compile the project, I get an error C2371 — redefinition different basic types.

Here is what I have been able to figure out thus far.

The variable that is generating the error is named NETWORK_ADDRESS . It is defined once in a header file that is part of my project and is associated with it using the #include directive.

The other place it is defined is in a file called.

C:Program FilesMicrosoft SDKsWindowsv6.0AIncludeNtDDNdis.h

Here is where I get stuck. I do not have an include statement in my project for this file. I have no idea why the compiler is even looking at this file. It should not be a part of this project.

How do I set VS2008 up so that it does not try to use this file?

Thank you in advance for your help.

Answers

I have searched every header file I have included in my project, and I cannot find anyone of them that include the NtDDNdis.h file. This sure is becoming a head scratcher.

You have to take into consideration not only the header files that you included in your project, but also the header files that are being included by the ones you included. For instance, if you include <windows.h>, it’s not enough to search for NtDDNdis.h in <windows.h>. You also have to search in every header file included by <windows.h>. And there may be dozens of those files !!!

Off course you don’t need to do that. Just comment out your definition of NETWORK_ADDRESS in your header file and right click on any NETWORK_ADDRESS you are using in your cpp file. Then select Go To Declaration, to see the NEWORK_ADDRESS defintion in NtDDNdis.h .

You can also right click your project name in the solution window and select :

Properties > Configuration Properties > C/C++ > Advanced > Show Includes > Yes

and the compiler will provide you a listing of all included files in your project.
- Marked as answer by
  
  Thursday, January 29, 2009 10:32 AM

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Compiler Error C2371

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