#include<stdio.h>
#include<string.h>
#include <time.h>
#include <stdlib.h>
void print(int board[9][9])/*打印的程序*/
{
	int i,j;
	printf("The original Sudoku matrix: \n");
	printf("|-----------------------|");
printf("\n");
for(i=0;i<9;i++)
{
	if(i==3)
	{
printf("|-----------------------|");
printf("\n");
	}
		if(i==6)
	{
printf("|-----------------------|");
printf("\n");
	}
	printf("| ");
	for(j=0;j<9;j++)
	{
		if(j==3) printf("| ");
		 if(j==6) printf("| ");
	printf("%d ",board[i][j]); 
	}
	printf("|");
	printf("\n");
}
printf("|-----------------------|\n");
}
void test(int board[9][9])/*测试是否为数独矩阵*/
{
	int num[10]={0};
	int k=0;
	int i=0,j=0;
	int a=0,b=0;
	for(i=0;i<9;i++)
	{
		for(j=0;j<9;j++)/*验证行*/
		{
			if(board[i][j]!=0&&num[board[i][j]]==0)
			num[board[i][j]]++;
			else if(board[i][j]!=0&&num[board[i][j]]!=0)
			{
				k++; 
				printf("False:Invalid initial Sudoku matrix!\n");
				printf("      The number %d in the col %d has been used!",board[i][j],i);
			}
		}
			for(i=0;i<10;i++)
			num[i]=0;
	}
	if(k==0)/*防止输出两次错误*/
	{
		for(i=0;i<9;i++)
	{
		for(j=0;j<9;j++)/*验证列*/
		{
			if(board[j][i]!=0&&num[board[j][i]]==0)
			num[board[j][i]]++;
			else if(board[j][i]!=0&&num[board[j][i]]!=0)
			{
				k++; 
				printf("False:Invalid initial Sudoku matrix!\n");
				printf("      The number %d in the row %d has been used!",board[j][i],i);
			}
		}
			for(i=0;i<10;i++)
			num[i]=0;
	}
	}
	if(k==0)/*防止输出两次错误*//*验证矩阵块*/
	{
		for(i=1;i<=3;i++)
		{
			for(j=1;j<=3;j++)
			{
				for(a=(i-1)*3;a<=i*3-1;a++)
				{
					for(b=(j-1)*3;b<=j*3-1;b++)
					{
					if(board[a][b]!=0&&num[board[a][b]]==0)
			        num[board[a][b]]++;	
			        else if(board[a][b]!=0&&num[board[a][b]]!=0)
			{
				k++; 
				printf("False:Invalid initial Sudoku matrix!\n");
				printf("      The number %d in the block %d has been used!",board[a][b],i*j);
			}
					}
				}
					for(i=0;i<10;i++)
			         num[i]=0;
			}
		}
	}
	if(k==0)/*最后输出正确*/
    printf("True:Valid initial Sudoku matrix!");
}
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}};
print(board);
test(board);
return 0; 
}