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Why is _CrtDumpMemoryLeaks reporting a memory leak here?

I want to check for memory leak in DEBUG mode. I use Windows and for this work performs the function _ CrtDumpMemoryLeaks .

Now, why does this code detect a memory leak?

#include <Windows.h>
#include <iostream>

int main()
{
    if(_CrtDumpMemoryLeaks() == TRUE)
        std::cerr << "MEMORY LEAK!" << std::endl;

    return 0;
}

EDIT:

I am adding this code for direct output to the console:

_CrtSetReportMode( _CRT_WARN, _CRTDBG_MODE_FILE );
_CrtSetReportFile( _CRT_WARN, _CRTDBG_FILE_STDOUT );
_CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_FILE );
_CrtSetReportFile( _CRT_ERROR, _CRTDBG_FILE_STDOUT );
_CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE );
_CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDOUT );

Conclusion:

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1 answer

Have you turned on <crtdbg.h>?

Are you sure you are working in debug mode?

In non-debug mode - calls _CrtDumpMemoryLeaks()are deleted by the preprocessor, leaving onlyif(TRUE)

EDIT: , , , malloc - . . ?

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
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