sudoku help

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im trying to create a program that will open a file and read it, then check to see if it is a solution for a sudoku puzzle. so far i have....

Code:

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fstream infile;

infile.open ( "good.txt", ifstream::in );

if ( infile.is_open() == false ) {
cout << "couldn't open " << endl;
}
int i;
int k;
int a [9] [9];
for (int i=0; i<9; i++)
{
for (int k=0; k<9; k++)
{
if (a[i][k]==k+1)
{
cout << "solved" << endl;
}
if(a[i][k]!=k+1)
{
cout<<"row "<<i<<" is missing "<<k+1<<endl;
}
}
}
return 0;

}

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my problem is that it doesnt diplay what it should. its like it isnt opening the file or reading it.

am i missing something?


also...im not sure how to have it check for a solution in a 3x3 square...any suggestionS?

If the file didn't open, you would be getting your error message.

Quote:

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am i missing something?

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Where do you read from the file?

Throw an "ios::nocreate" flag in to that .open statement. Then check to see if it's opening.

Quote:

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any suggestionS?

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Indent your code. It makes it much easier to read and debug.