sudoku program

This is a discussion on sudoku program within the C Programming forums, part of the General Programming Boards category; guys ive written a sudoku 9x9 prg..... can you please tell me where i am going wrong..... Code: #include<iostream.h> #include<stdio.h> ...

  1. #1
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    Nov 2007
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    73

    sudoku program

    guys ive written a sudoku 9x9 prg.....
    can you please tell me where i am going wrong.....

    Code:
    #include<iostream.h>
    #include<stdio.h>
    int chk_pos(int i,int j,int n);
    void sol_pos(void);
    int a[10][10][10]={0};
    int chk(int i,int j,int n)
    {
    	int suc=0;
    	for(int col=0;col<9;col++)
    		if(a[i][col][0]==n)
    		{
    			suc=1;break;
    		}
    	for(int row=0;row<9;row++)
    		if(a[row][j][0]==n)
    		{
    			suc=1;break;
    		}
    	i=i/3;j=j/3;
    	for(row=3*i;row<3*(i+1);row++)
    		for(col=3*j;col<3*(j+1);col++)
    			if(a[row][col][0]==n)
    				suc=1;
    	if(suc==0)
    		return n;
    	else
    		return 0;
    
    }
    
    
    void sol_pos(void)
    {
    	int i,j,k,fail=0;
    	for(i=0;i<9;i++)
    		for(j=0;j<9;j++)
    			for(k=1;k<9;k++)
    				a[i][j][k]=0;
    	for(i=0;i<9;i++)
    	{
    		for(j=0;j<9;j++)
    		{
    			k=1;
    			if(a[i][j][0]==0)
    			{
    				for(int num=1;num<=9;num++)
    				{
    					if(chk(i,j,num)!=0)
    						a[i][j][k++]=num;
    				}
    			}
    		}
    	}
    	for(i=0;i<9;i++)
    	{
    		for(j=0;j<9;j++)
    		{
    			if(a[i][j][0]==0 && a[i][j][2]==0)
    			{
    				fail=1;
    				a[i][j][0]=a[i][j][1];
    			}
    		}
    	}
    	if(fail==1)
    		sol_pos();
    }
    
    
    
    
    int main()
    {
    	int rown,coln,n;
    	cout<<"enter rown coln n :0 to exit:";
    	do{
    		cin>>rown>>coln>>n;
    		if(rown>9 || coln>9 || n>9 || n<1)
    			cout<<"invalid input";
    		else
    			a[rown-1][coln-1][0]=n;
    	}while(n!=0);
    	sol_pos();
    	for(int i=0;i<9;i++)
    	{
    		for(int j=0;j<9;j++)
    			cout<<a[i][j][0]<<" ";
    		cout<<"\n";
    	}
    	return 0;
    }

  2. #2
    C++ Witch laserlight's Avatar
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    1. What is it supposed to do?
    2. How does it not work?
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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