From 53726cc4f01b1473bc1ebefed80861ee1294ccfd Mon Sep 17 00:00:00 2001
From: Saturneric <eric.bktu@gmail.com>
Date: Mon, 31 Aug 2020 23:29:24 +0800
Subject: [PATCH] Create main.c

---
 main.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 main.c

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..d09556b
--- /dev/null
+++ b/main.c
@@ -0,0 +1,93 @@
+//
+//  main.c
+//  Eight Queen
+//
+//  Created by Eric on 15-7-19.
+//  Copyright (c) 2015年 Eric Bakantu. All rights reserved.
+//
+
+#include <stdio.h>
+#include <time.h>
+#define T_MAX 8
+int T_count;
+
+int queen(int count, int table[8][8]);
+
+int main() {
+    int start = clock();
+    int table[8][8];
+    for (int x = 0; x < 8; x++)
+        for ( int y = 0; y < 8 ; y++)
+            table[x][y] = 1;
+    
+    queen(0,table);
+    printf("OK! T_count = %d \n",T_count);
+    int end = clock();
+    int total = end - start;
+    printf("TOTAL TIME: %d",total);
+    return 0;
+}
+
+int queen(int count, int table[8][8]){
+    
+        int m_table[8][8],x,y,k,i;
+        //复制棋盘
+        for (x = 0; x < 8; x++)
+            for ( int y = 0; y < 8 ; y++)
+                m_table[x][y] = table[x][y];
+        //检查列
+        for (i = 0; i < T_MAX; i++){
+            //如果可以放置
+            if (m_table[count][i] == 1) {
+                //竖直禁用
+                for (k = 0; k < 8; k++){
+                    m_table [k][i] = 0;
+                    m_table [count][k] = 0;
+                }
+                
+                x=count;
+                y=i;
+                //左斜禁用
+                while(x<8 && y<8){
+                    
+                    m_table[x++][y++] = 0;
+                    
+                }
+                
+                x=count;
+                y=i;
+                //右斜禁用
+                while(x<8 && y>=0){
+                    
+                    m_table[x++][y--] = 0;
+                    
+                }
+                //放棋
+                m_table[count][i] = 9;
+                
+                //判断行
+                if (count < 7) {
+                    queen(count+1, m_table);
+                }
+                else{
+                    //如果底行输出
+                    /*for (x = 0; x < 8; x++){
+                        for ( int y = 0; y < 8 ; y++)
+                            printf("%d ",m_table[x][y]);
+                        printf("\n");
+                    }
+                    printf("The %d Answer\n\n",T_count);*/
+                    T_count++;
+                }
+                //恢复棋盘
+                for (x = 0; x < 8; x++)
+                    for (y = 0; y < 8 ; y++)
+                        m_table[x][y] = table[x][y];
+                
+            }
+            
+        }
+    
+    return 0;
+    
+}
\ No newline at end of file