參考 劍指offer 實現的

#include <iostream>
#include <string>
using namespace std;

int Num = 0;

void Permutation(int *pInt, int *pBegin)
{
	if (pBegin == pInt + 7) {
		bool Mark = true;
		
		for (int i = 0; i < 8; i++)
			for (int j = i + 1; j < 8; j++) 
			if (i - j == pInt[i] - pInt[j] ||
				j - i == pInt[i] - pInt[j]) {
				Mark = false;
				break;
			}

		if (Mark) Num++;
	} else {
		for (int *an = pBegin; an <= pInt + 7; an++) {
			int temp = *an;
			*an = *pBegin;
			*pBegin = temp;

			Permutation(pInt, pBegin + 1);

			temp = *an;
			*an = *pBegin;
			*pBegin = temp;
		}
	}

	
}

void Permutation(int *pInt)
{
	Permutation(pInt, pInt);
	cout << Num << endl;
}

int main()
{
	int ColumnIndex[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
	Permutation(ColumnIndex);
}