二进制转十进制十进制转二进制

void dec_to_bin(unsigned long num, vector<int> & ivec2)
{
	vector<int> ivec;
	unsigned long Num = num;  //存储原数据
	//对原数据循环求除以2的余数,并存储在vector对象中
	while (num != 0)
	{
		ivec.push_back(num % 2);
		num = num / 2;
	}

	//对求得的余数倒序排序并存储在vector中，求得二进制
	vector<int>::size_type sz = ivec.size();
	for (vector<int>::size_type index = 0; index != sz; ++index)
		ivec2.push_back(ivec[sz - 1 - index]);

}
void bin_to_dec(vector<int>  ivec2, unsigned long & num)
{
	num = 0;
	int i = ivec2.size();
	int a = 0;
	for (; i >0; i--)
	{
		num+= ivec2 [a]*pow(2, i-1);
		a++;
	}



}