Visual Studio express 2013 for desktop Error แปลกๆ ขอให้ช่วยดูด้วยนะครับ

#include<stdio.h>
void main()
{
	int A1, A2, A3, b = 2, bignum, bignum1;
	printf("Please input 3 number");
	scanf("%d %d %d", &A1, &A2, &A3);
	if (A1 > A2 > A3)
	{
		bignum = A1;
	}
	if (A2 > A1 > A3)
	{
		bignum = A2;
	}
	if (A3 > A2 > A1)
	{
		bignum = A1;
	}
	while (b <= bignum)
	{
		if (b%A1 == 0 || b%A2 == 0 || b%A3 == 0)
		{
			bignum1 = b;
		}
		b++;
	}
	printf("HRM = %d", bignum1);
}