SP-0302 (SEH Demo)

// SP0302demo.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
LONG filter1(DWORD ex);
int count=0;
const int max_count=3;
int _tmain(int argc, _TCHAR* argv[])
{
    FILE *fin;
    errno_t err;
    int a=0,b=0,y=0;
    err=fopen_s(&fin,"D:\\A.TXT","rt");
    fscanf_s(fin,"%d\n",&a);
    printf_s("a=%d",a);
    fscanf_s(fin,"%d\n",&b);
    printf_s("b=%d",b);
    __try {
        y=a/(a+b);
    }
    __except(filter1(GetExceptionCode()))
    {
        b=-b;
        y=(a+b)/a;
    }

    printf_s("y=%d\n",y);
    getchar();
    return 0;
}

LONG filter1(DWORD ex)
{
    if (ex== EXCEPTION_INT_DIVIDE_BY_ZERO)
        if (++count>max_count)
            return EXCEPTION_EXECUTE_HANDLER;
        else
            printf("\n******** %d ********\n",count);
    return EXCEPTION_CONTINUE_EXECUTION;
}