Subtracting user input

Tito Onowu

Good day teachers. Am back again. Was trying to get this program to tell me how many steps has been taken from one point to the other. There should be 64 squares (A-H, 1-8)and can move from one point A to H by numerical identification.moving toward the left might be negative or from the middle downwards but all outcome regardless the sign should be positive. This is where i got and am still thinking how to make out the logic to get the right result.
Thanks.

string pos0;

string pos1;

int move;

{

Console.WriteLine(@"Enter King's position, A-H 1-8 : ");

pos0 = Console.ReadLine().ToUpper();

}

while(pos0.Length != 2 ||

!(pos0[0] >= 'A' && pos0[0] <= 'H') ||

!(pos0[1] >= '1' && pos0[1] <= '8'));

Console.WriteLine(@"King's position is: ");

Console.WriteLine();

{

Console.WriteLine(@"Enter the position where King needs to be, A-H 1-8 : ");

pos1 = Console.ReadLine().ToUpper();

}

while (pos1.Length != 2 ||

!(pos1[0] >= 'A' && pos1[0] <= 'H') ||

!(pos1[1] >= '1' && pos1[1] <= '8'));

Console.WriteLine(@"King's position is: ");

Console.WriteLine();

move = pos0[1] - pos1[1];

Console.WriteLine("King moved: ", move);

Console.ReadKey ();

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes13y ago
Accepted answer
If we assume that the king can only move 1 square horizontally or vertically and ignore possible diagonal movement, then this should work:

using System;

class Program
{
static void Main()
{

string pos0;
string pos1;
int move;

do
{
Console.WriteLine("Enter King's position, A-H 1-8 : ");
pos0 = Console.ReadLine().ToUpper();
}
while(pos0.Length != 2 ||
!(pos0[0] >= 'A' && pos0[0] <= 'H') ||
!(pos0[1] >= '1' && pos0[1] <= '8'));

Console.WriteLine("King's position is : {0}", pos0);
Console.WriteLine();

do
{
Console.WriteLine("Enter the position where King needs to be, A-H 1-8 : ");
pos1 = Console.ReadLine().ToUpper();
}
while (pos1.Length != 2 ||
!(pos1[0] >= 'A' && pos1[0] <= 'H') ||
!(pos1[1] >= '1' && pos1[1] <= '8'));

Console.WriteLine("King's position is: {0}", pos1);
Console.WriteLine();

move = Math.Abs(pos0[0] - pos1[0]) + Math.Abs(pos0[1] - pos1[1]);
Console.WriteLine("King moved: {0} squares", move);
Console.ReadKey ();
}
}
Tito Onowu13y ago
Take you so much for relieving my thoughts sir. Now I can keep thriving on :)