ifstream inputfile("cross_input2.txt");

string line;

char matrix_original[10][10];

int matrix[10][10];

bitset<10> matrix_bitset;

int row=0,col=0;

if(inputfile.is_open()){

while(getline(inputfile,line)){

col=0;

for(int i=0; i< line.size(); i++){

cout<<line[i]<<" ";

matrix_original[row][col] = line[i];

if(matrix_original[row][col] != '.'){

matrix[row][col] = matrix_original[row][col] - '0';

matrix_bitset[row][col].set(matrix[row][col],1);

}else{

matrix[row][col] = INF;

}

col++;

}

cout<<endl;

row++;

}

}

inputfile.close();

return 0;

//validate the box 0-9

bitset<10> temp;

for(int i=0;i<3;i++){

for(int j=0;j<3;j++){

if(matrix[i][j]!=INF){

if(temp.test(matrix[i][j])){

cout<<"ERROR";

exit(1);

}

}

}

}