public Pair[] toPair(string s)
{
Pair[] temp = new Pair[10];
Char[] tempd = s.ToCharArray();
for (int i = 0; i <= 9; i++)
{
temp[i].x = new Digit(i);
temp[i].y = new Digit(tempd[i]);
}
return temp;
}
public static Pair[] genFirstRoots(Digit d)
{
//create array of root arrays
Pair[][] roots = new Pair[][] {
new Pair[] { new Pair(1,1), new Pair(3,7), new Pair(9,9)}, //produce 1 in ones digit
new Pair[] { new Pair(1,3), new Pair(7,9)}, //produce 3 in ones digit
new Pair[] { new Pair(1,7) , new Pair(3,9)}, //produce 7 in ones digit
new Pair[] { new Pair(1,9) , new Pair(3,3), new Pair(7,7)}}; // produce 9 in ones digit
switch (d.Value)
{
case 1: //if ones digit is 1
return roots[0];
case 3: //if ones digit is 3
return roots[1];
case 7: //if ones digit is 7
return roots[2];
case 9: //if ones digit is 9
return roots[3];
default: //else return defualt
return null;
}
}