struct node{
	int num[1005],len;
	node(){
		len = 0;
	}
	node operator+(node b){
		node c;
		c.len = max(b.len,len) + 1;
		for(int i = 1;i <= c.len;i ++){
			c.num[i] += num[i] + b.num[i];
			c.num[i + 1] += c.num[i] % 10;
			c.num[i] /= 10; 
		}
		if(!c.num[c.len])
			c.len --;
		return c;
	}
}a[85];

1、结构体里重载的+对于main函数里int型的z=x+y有影响吗 2、哪些因素影响重载的影响范围啊