48. 旋转图像

扣边界扣了半天

#include
#include

using namespace std;

void rotate(vector>& a) {
	for(int i=0; i<(int)a.size()/2; ++i)
	{
		for(int j=i; j<(int)a.size()-1-i; ++j)
		{
			swap(a[i][j], a[j][a[0].size()-1-i]);
			swap(a[i][j], a[a.size()-1-i][a[0].size()-1-j]);
			swap(a[i][j], a[a.size()-1-j][i]);
		}
	}
}
int main(void)
{
	vectora1={5,1,9,11};
	vectora2={2,4,8,10};
	vectora3={13,3,6,7};
	vectora4={15,14,12,16};

	vector >a;
	a.push_back(a1);
	a.push_back(a2);
	a.push_back(a3);
	a.push_back(a4);
	rotate(a);
	return 0;
}