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knightsmove.cpp
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knightsmove.cpp
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#include <iostream>
#include <vector>
#include <map>
using namespace std;
struct position{
char x;
int y;
};
typedef position coordinate;
bool isvalid (coordinate c);
vector<coordinate> returnAllNextMove(coordinate pos);
vector<coordinate> returnValidMoves(coordinate pos);
map< int,vector<coordinate> > returnAllPossibleMoves();
int ChesstoPosNumber(coordinate c);
int main(){
coordinate c;
c.x = 'b';
c.y = 4;
vector<coordinate> ValidMoves = returnValidMoves(c);
vector<coordinate>::iterator it;
map< int,vector<coordinate> > FinalMap = returnAllPossibleMoves();
for ( it = ValidMoves.begin(); it < ValidMoves.end() ; it++){
coordinate tempc = *it;
cout << "(" << tempc.x << "," << tempc.y << ")" << endl;
}
vector<coordinate> tempvect;
for ( int it = 1; it <= 64 ; it++){
tempvect = FinalMap.find(it)->second;
cout << "Position for " << it << " is: ";
vector<coordinate>::iterator itvect;
for ( itvect = tempvect.begin() ; itvect < tempvect.end() ; itvect++)
cout << "(" << (*itvect).x << "," << (*itvect).y << ")" << " -- ";
cout << endl;
}
}
int ChesstoPosNumber(coordinate c){
int PosNumber=0;
PosNumber = (c.y-1)*8+(int)(c.x-96);
return PosNumber;
}
map< int,vector<coordinate> > returnAllPossibleMoves(){
coordinate tempc;
int posNum;
map< int,vector<coordinate> > FinalMap;
for ( char x = 'a' ; x <= 'h' ; x++)
for ( int y = 1 ; y<= 8 ; y++ ){
tempc.x = x;
tempc.y = y;
posNum = ChesstoPosNumber(tempc);
vector<coordinate> vt = returnValidMoves(tempc);
FinalMap.insert( pair< int,vector<coordinate> >(posNum,vt) );
}
return FinalMap;
}
bool isvalid ( coordinate c){
if(c.x >= 'a' && c.x <= 'h' && c.y >= 1 && c.y <= 8 )
return true;
else return false;
}
vector<coordinate> returnAllNextMove(coordinate pos){
coordinate c;
vector<coordinate> AllNextMove;
c.x = pos.x - 2;
c.y = pos.y - 1;
AllNextMove.push_back(c);
c.x = pos.x - 2;
c.y = pos.y + 1;
AllNextMove.push_back(c);
c.x = pos.x + 2;
c.y = pos.y - 1;
AllNextMove.push_back(c);
c.x = pos.x + 2;
c.y = pos.y + 1;
AllNextMove.push_back(c);
c.x = pos.x - 1;
c.y = pos.y - 2;
AllNextMove.push_back(c);
c.x = pos.x + 1;
c.y = pos.y - 2;
AllNextMove.push_back(c);
c.x = pos.x - 1;
c.y = pos.y + 2;
AllNextMove.push_back(c);
c.x = pos.x + 1;
c.y = pos.y + 2;
AllNextMove.push_back(c);
return AllNextMove;
}
vector<coordinate> returnValidMoves(coordinate pos){
vector<coordinate> AllNextMove = returnAllNextMove(pos);
vector<coordinate> ValidMoves;
vector<coordinate>::iterator it;
for ( it = AllNextMove.begin(); it < AllNextMove.end() ; it++)
if ( isvalid (*it))
ValidMoves.push_back (*it);
return ValidMoves;
}