int func (int r,int c)
{
status=0;
placed=0;
for (int i=r ;i<rc;i++)
{
for(int j=c;j<rc;j++)
{
if (checkcolum(i,j) && checkrow(i,j)&& checkdiagonally(i,j) && checkcrossdiag(i,j))
{
placed=1;
chessboard[i][j]=QUEEN;
status=func(i+1,0);
if(status==-1)
{
chessboard[i][j]=0;
placed=0;
}
if(status==1)
return 1;
}
}
if (placed!=1)
return -1;
}
return 1;
}
bool isSafe(int g[N][N], int row, int col, int num)
{
return ( !checkcol(g, col, num) &&
!checkrow(g, row, num) &&
!check3by3grid(g,row-row%3, col-col%3, num));
}
int available(sudokuGrid** grd, int row, int col, int num) {
int a = checkcolumn(grd, col, num);
int b = checkrow(grd, row, num);
int c = checkgrid(grd, row, col, num);
return a && b && c;
}
void loop() {
// get block
block blck = getRdm();
// update the grid and print
// for (int i = 0; i < 4; ++i){
// grid[blck.row[i]][blck.col[i]] = 1;
// }
block old_blck = blck;
printblock(blck);
while(down(&blck)) {
// blck is has been moved down.
// remove old_blck
removeblock(old_blck);
// update old_blck
old_blck = blck;
// check "turn" button
if (digitalRead(turnPin) == HIGH) {
// turn us
turnblock(&blck);
}
// check "left block"
if (digitalRead(leftPin) == HIGH) {
// go left if possible - arguments are blockr and blockc
left(&blck);
}
// check "right block"
if (digitalRead(rightPin) == HIGH) {
// go right if possible - arguments are blockr and blockc
right(&blck);
}
// remove old_blck
removeblock(old_blck);
// update old_blck
old_blck = blck;
// print new blck
printblock(blck);
// difficulty
// change how fast the block falls based on score
if (score < 5) {
Serial.println(1);
delay(250);
}
if (score >= 5 && score < 10) {
Serial.println(2);
delay(200);
}
if (score >= 10 && score < 20) {
Serial.println(3);
delay(150);
}
if (score >= 20) {
Serial.println(4);
delay(100);
}
// gridprinter();
}
// check grid for and full rows or endgame.
checkrow();
}