diff --git a/zhangbaozhe.c b/zhangbaozhe.c
new file mode 100644
index 0000000..c861ed7
--- /dev/null
+++ b/zhangbaozhe.c
@@ -0,0 +1,272 @@
+#include<stdio.h>
+#include<time.h>
+#include<stdlib.h>
+#include<stdbool.h>
+void putboard(int board[][9])
+{
+	printf("|-----------------------|\n");
+	for(int i=0;i<9;i++)
+	{
+		printf("|");
+		for(int j=0;j<9;j++)
+		{
+			printf("%2d",board[i][j]);
+			if(j==2||j==5||j==8)
+			printf(" |");
+		}
+		printf("\n");
+		if(i==2||i==5||i==8)
+		printf("|-----------------------|\n");
+	}
+}
+void judgeboard(int board[][9])
+{
+	int judge=0;
+	printf("The original Sudoku matrix:\n");
+	putboard(board);
+	flag1:
+	if(judge==0)
+	{
+	for(int i=0;i<9;i++)
+	{
+		for(int j=0;j<9;j++)
+		{
+			if(board[i][j]!=0)
+			{
+				for(int m=0;m<9;m++)
+				{
+					if(board[i][m]==board[i][j]&&m!=j)
+					{
+						printf("False:Invalid initial Sudoku matrix!\n");
+						printf("      The number %d in the line %d has been used!\n",board[i][j],i+1);
+						judge=1;
+						goto flag1;
+					}
+				}
+			}
+		}
+	}
+    }
+    flag2:
+	if(judge==0)
+	{
+		for(int i=0;i<9;i++)
+    	{
+		for(int j=0;j<9;j++)
+		{
+			if(board[j][i]!=0)
+			{
+				for(int m=0;m<9;m++)
+				{
+					if(board[m][i]==board[j][i]&&m!=j)
+					{
+						printf("False:Invalid initial Sudoku matrix!\n");
+						printf("      The number %d in the col %d has been used!\n",board[j][i],i+1);
+						judge=1;
+						goto flag2;
+					}
+				}
+			}
+		}
+    	}
+	}
+	flag3:
+	if(judge==0)
+	{
+		for(int i=0;i<=6;i=i+3)
+		{
+			for(int j=0;j<=6;j=j+3)
+			{
+				for(int x=i;x<i+3;x++)
+				{
+					for(int y=j;y<j+3;y++)
+					{
+						if(board[x][y]!=0)
+						{
+							for(int m=i;m<i+3;m++)
+							{
+								for(int n=j;n<j+3;n++)
+								{
+									if(board[m][n]==board[x][y]&&(m!=x||n!=y))
+									{
+										printf("False:Invalid initial Sudoku matrix!\n");
+										printf("      The number %d in the block %d has been used!\n",board[x][y],i/3+1+(j/3+1)*3);
+										judge=1;
+										goto flag3;
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	if(judge==0)
+	printf("True:Valid initial Sudoku matrix!\n");
+}
+int judgeboard2(int board[][9])
+{
+	int judge=0;
+	flag1:
+	if(judge==0)
+	{
+	for(int i=0;i<9;i++)
+	{
+		for(int j=0;j<9;j++)
+		{
+			if(board[i][j]!=0)
+			{
+				for(int m=0;m<9;m++)
+				{
+					if(board[i][m]==board[i][j]&&m!=j)
+					{
+						judge=1;
+						goto flag1;
+					}
+				}
+			}
+		}
+	}
+    }
+    flag2:
+	if(judge==0)
+	{
+		for(int i=0;i<9;i++)
+    	{
+		for(int j=0;j<9;j++)
+		{
+			if(board[j][i]!=0)
+			{
+				for(int m=0;m<9;m++)
+				{
+					if(board[m][i]==board[j][i]&&m!=j)
+					{
+						judge=1;
+						goto flag2;
+					}
+				}
+			}
+		}
+    	}
+	}
+	flag3:
+	if(judge==0)
+	{
+		for(int i=0;i<=6;i=i+3)
+		{
+			for(int j=0;j<=6;j=j+3)
+			{
+				for(int x=i;x<i+3;x++)
+				{
+					for(int y=j;y<j+3;y++)
+					{
+						if(board[x][y]!=0)
+						{
+							for(int m=i;m<i+3;m++)
+							{
+								for(int n=j;n<j+3;n++)
+								{
+									if(board[m][n]==board[x][y]&&(m!=x||n!=y))
+									{
+										judge=1;
+										goto flag3;
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	return judge;
+}
+void creatboard(int board[][9])
+{
+	srand(time(NULL));
+	for(int i=0;i<9;i++)
+	{
+		for(int j=0;j<9;j++)
+		board[i][j]=0;
+	}
+	int a[9]={0};
+	int n,m;
+	for(int i=1;i<=3;i++)
+	{
+		for(int j=1;j<=9;j++)
+		{
+			n=rand()%10;
+			m=rand()%10;
+			while(!(n-(i-1)*3>=0&&n-(i-1)*3<3)||a[n]>=3||!(m>=0&&m<9)||board[n][m]!=0)
+			{
+				n=rand()%10;
+		    	m=rand()%10;
+			}
+			board[n][m]=j;
+			a[n]++;
+		}
+	}
+}
+bool solveboard(int board[][9])
+{
+	int n=10,m=10;
+	flag:
+	if(n==10)
+	{
+	for(int i=0;i<9;i++)
+	{
+		for(int j=0;j<9;j++)
+		{
+			if(board[i][j]==0)
+			{
+				n=i;
+				m=j;
+				goto flag;
+			}
+			if(i==8&&j==8)
+			return true;
+		}
+	}
+    }
+	for(int x=1;x<=9;x++)
+	{
+		board[n][m]=x;
+		int c=judgeboard2(board);
+		board[n][m]=0;
+		if(c==0)
+		{
+			board[n][m]=x;
+			if(solveboard(board))
+			return true;
+			board[n][m]=0;
+		}
+	}
+	return false;
+}
+int main()
+{
+	int board[9][9] = {{5, 3, 0, 0, 7, 0, 0, 0, 0},
+{6, 0, 0, 1, 9, 5, 0, 0, 0},
+{0, 9, 8, 0, 0, 0, 0, 6, 0},
+{8, 0, 0, 0, 6, 0, 0, 0, 3},
+{4, 0, 0, 8, 0, 3, 0, 0, 1},
+{7, 0, 0, 0, 2, 0, 0, 0, 6},
+{0, 6, 0, 0, 0, 0, 2, 8, 0},
+{0, 0, 0, 4, 1, 9, 0, 0, 5},
+{0, 0, 0, 0, 8, 0, 0, 7, 9}};
+    judgeboard(board);
+	int n=judgeboard2(board);
+	if(n==1)
+	printf("No Solution!\n");
+	else
+	if(solveboard(board))
+	{
+		printf("The solution of Sudoku matrix:\n");
+		solveboard(board);
+		putboard(board);
+	}
+	else
+	printf("No Solution!\n");
+	return 0;
+}
\ No newline at end of file