#include<iostream>
using namespace std;
static int gEightQueen[8] = { 0 }, gCount = 0;
void print()//输出每一种情况下棋盘中皇后的摆放情况
{
for (int i = 0; i < 8; i++)
{
int inner;
for (inner = 0; inner < gEightQueen[i]; inner++)
cout << "0";
cout <<"#";
for (inner = gEightQueen[i] + 1; inner < 8; inner++)
cout << "0";
cout << endl;
}
cout << "==========================\n";
}
int check_pos_valid(int loop, int value)//检查是否存在有多个皇后在同一行/列/对角线的情况
{
int index;
int data;
for (index = 0; index < loop; index++)
{
data = gEightQueen[index];
if (value == data)
return 0;
if ((index + data) == (loop + value))
return 0;
if ((index - data) == (loop - value))
return 0;
}
return 1;
}
void eight_queen(int index)
{
int loop;
for (loop = 0; loop < 8; loop++)
{
if (check_pos_valid(index, loop))
{
gEightQueen[index] = loop;
if (7 == index)
{
gCount++, print();
gEightQueen[index] = 0;
return;
}
eight_queen(index + 1);
gEightQueen[index] = 0;
}
}
}
int main(int argc, char*argv[])
{
eight_queen(0);
cout << "total=" << gCount << endl;
return 0;
}
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