缘由求解，运算函数，哪位大神教一下-编程语言-CSDN问答

void 三位数平方含有该数()
{//缘由https://ask.csdn.net/questions/7560152?spm=1005.2025.3001.5141
	int a = 100, aa = 1000, f = 0;
	while (a < aa)
	{
		f = a*a;
		while (f >= a)
			if ((f - a) % aa)
				f /= 10;
			else
				cout << a*a << "\t" << a << "\n", f = 0;
		++a;
	}
}