diff --git a/3判断矩阵.c b/3判断矩阵.c
new file mode 100644
index 0000000..d672b63
--- /dev/null
+++ b/3判断矩阵.c
@@ -0,0 +1,138 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+int main(){
+int board0[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}};
+int board1[9][9] = {{8, 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}};
+	printf("The original Sudoku matrix:\n");
+	int i=0,j=0,z=0,k=0,m=0;
+
+for(i=0;i<9;i++){
+	if(i==0)
+	{printf("|-----------------------|");
+	printf("\n");
+	}
+	for(j=0;j<9;j++)
+	{
+		if(j==0)
+		{printf("| ");
+		}
+		printf("%d ",board0[i][j]);
+		if(j%3==2&&j!=0){
+			printf("| ");
+		}
+		if(j==8){
+			printf("\n");
+		}
+	}
+	if(i%3==2&&i!=0)
+	{
+		printf("|-----------------------|\n");
+	}
+}
+
+
+
+	int a[10];
+	for(m=0;m<=10;m++)
+	{
+		a[m]=0;
+	}
+
+	for(i=0;i<9;i++)
+	{
+		for (j=0;j<9;j++)
+		{
+		   a[board0[i][j]]++;
+		}
+		for (j=1;j<10;j++)
+		{
+		   if(a[j]>1)
+		   {
+		   	printf("False:Invalid initial Sudoku matrix!\n");
+		   	printf("The number %d in the row %d has been used!\n",j,i+1);
+		   	k++;
+		   	exit(0);
+		   }
+		}
+	for(m=0;m<=10;m++)
+	{
+		a[m]=0;
+	}
+
+		                    
+	}
+	for(j=0;j<9;j++)
+	{
+		for (i=0;i<9;i++)
+		{
+		   a[board0[i][j]]++;
+		}
+		for (i=1;i<10;i++)
+		{
+		   if(a[i]>1)
+		   {
+		   	printf("False:Invalid initial Sudoku matrix!\n");
+		   	printf("The number %d in the col %d has been used!\n",i,j+1);
+		   	k++;
+		   exit(0);
+		   }
+		}
+	for(m=0;m<=10;m++)
+	{
+		a[m]=0;
+	}
+
+		                    
+	}
+for(z=0;z<3;z++){
+
+
+ for(i=z*3;i<(z+1)*3;i++)
+ {
+ 	for(j=i*3;j<(i+1)*3;j++){
+ 		a[board0[i][j]]++;
+
+	 }
+      for (j=1;j<10;j++)
+		{
+		   if(a[j]>1)
+		   {
+		   	printf("False:Invalid initial Sudoku matrix!\n");
+		   	printf("The number %d in the block %d has been used!\n",j,z*3+i/3+j/3);
+		   	k++;
+		   exit(0);
+		   }
+
+       }
+	for(m=0;m<=10;m++)
+	{
+		a[m]=0;
+	}
+
+
+}
+	
+}
+	if(k==0)
+	{
+		printf("True:Valid initial Sudoku matrix!");
+	}
+	return 0;
+}