var?chessBoard=[];//二維數(shù)組來存儲交叉點落子情況
var?me=true;
var?over=false;
/*贏法數(shù)組(三維)*/
var?wins=[];
/*贏法的統(tǒng)計數(shù)組*/
var?mywin=[];
var?computerwin=[];
//二維數(shù)組來存儲交叉點落子情況
for(var?i=0;i<15;i++)
{
	chessBoard[i]=[];
	for(var?j=0;j<15;j++){
		//初始化，0代表未落子為空
		chessBoard[i][j]=0;
	}
}
/*三維數(shù)組*/
for(var?i=0;i<15;i++){
	wins[i]=[];
?for(var?j=0;j<15;j++){
?	wins[i][j]=[];
?}
}
/*贏法種類的索引*/
var?count=0;/*橫線*/
for(var?i=0;i<15;i++){
	for(var?j=0;j<11;j++){
		//wins[0][0][0]=true;
		//wins[0][1][0]=true;
		//wins[0][2][0]=true;
		//wins[0][3][0]=true;
		//wins[0][4][0]=true;
		
		
		for(var?k=0;k<5;k++){
			wins[i][j+k][count]=true;
		}
		count++;
	}
}
/*豎線*/
for(var?i=0;i<15;i++){
	for(var?j=0;j<11;j++){
		for(var?k=0;k<5;k++){
			wins[j+k][i][count]=true;
		}
		count++;
	}
}
/*斜線*/
for(var?i=0;i<11;i++){
	for(var?j=0;j<11;j++){
		for(var?k=0;k<5;k++){
			wins[i+k][j+k][count]=true;
		}
		count++;
	}
}
/*反斜線*/
for(var?i=0;i<11;i++){
	for(var?j=14;j>3;j--){
		for(var?k=0;k<5;k++){
			wins[i+k][j-k][count]=true;
		}
		count++;
	}
}
console.log(count);
//初始化贏法統(tǒng)計數(shù)組
for(var?i=0;i<count;i++){
	mywin[i]=0;
	computerwin[i]=0;
}
var?chess=document.getElementById('chess');
var?context=chess.getContext('2d');
context.strokeStyle="BFBFBF";
var?icon=new?Image();
icon.src="../css/images/icon.png";
icon.onload=function(){
	?//繪制北背景圖
context.drawImage(icon,0,0,450,450);
?//繪制五子棋棋盤
drawChessBoard();
?
}
//畫棋盤
var?drawChessBoard=function(){
	for(var?i=0;i<15;i++)
{
context.moveTo(15+i*30,15);/*畫橫線，垂直坐標(biāo)不變*/
context.lineTo(15+i*30,435);
context.stroke();
context.moveTo(15,15+i*30);/*畫豎線，橫坐標(biāo)不變*/
context.lineTo(435,15+i*30);
context.stroke();//stroke是用來描邊的
}
}
?var?oneStep=function(i,j,me){
?	?//繪制棋子
context.beginPath();
context.arc(15+i*30,15+j*30,13,0,2*Math.PI);/*圓心坐標(biāo)，半徑，弧度*/
context.closePath();
//實現(xiàn)漸變
var?gradient=context.createRadialGradient(15+i*30+2,15+j*30-2,13,15+i*30+2,15+j*30-2,0);
if(me){
gradient.addColorStop(0,"#0A0A0A");
gradient.addColorStop(1,"#636766");}
else?{gradient.addColorStop(0,"#D1D1D1");
gradient.addColorStop(1,"#f9f9f9");}
context.fillStyle=gradient;
//fill是用來填充
context.fill();
}

//落子

chess.onclick=function(e){
	if(over){
		return;
	}//onclick只有在我方下棋時才有效
	if(!me){return;}
	var?x=e.offsetX;
	var?y=e.offsetY;
	var?i=Math.floor(x/30);
	var?j=Math.floor(y/30);
	
	if(chessBoard[i][j]==0){
		oneStep(i,j,me);
		
			chessBoard[i][j]=1;

			
	
		
		for(var?k=0;k<count;k++){
			if(wins[i][j][k]){
				//若存在一個K，使得myWin【k】=5,說明第k種贏法被實現(xiàn)
				mywin[k]++;
				//6為異常情況，表示不可能贏
				computerwin[k]=6;
				if(mywin[k]==5){
					window.alert("你贏了");
????????????????????over=true;
				}
			}
		}//若沒結(jié)束，下棋權(quán)利給計算機(jī)
		if(!over){
			me=!me;
			computerAI();
		}
	}	
}
var?computerAI=function(){
??var?myScore=[];
??var?computerScore=[]
??//保存最高分?jǐn)?shù)
??var?max=0;
??var?u=0,v=0;
??for(var?i=0;i<15;i++){
??	myScore[i]=[];
??	computerScore[i]=[];
??	for(var?j=0;j<15;j++){
??		myScore[i][j]=0;
??		computerScore[i][j]=0;
??	}
??}
??for(var?i=0;i<15;i++){
??	for(var?j=0;j<15;j++){
??		if(chessBoard[i][j]==0){
??			for(var?k=0;k<count;k++){
??				if(wins[i][j][k]){
??					if(mywin[k]==1){
??						myScore[i][j]+=200;
??					}
??					else?if(mywin[k]==2){
??						myScore[i][j]+=400;
??					}
??					else?if(mywin[k]==3){
??						myScore[i][j]+=2000;
??					}
??					else?if(mywin[k]==4){
??						myScore[i][j]+=10000;
??					}
??					if(computerwin[k]==1){
??						computerScore[i][j]+=220;
??					}
??					else?if(computerwin[k]==2){
??						computerScore[i][j]+=420;
??					}
??					else?if(computerwin[k]==3){
??						computerScore[i][j]+=2100;
??					}
??					else?if(computerwin[k]==4){
??						computerScore[i][j]+=20000;
??					}
??				}
??			}
??			if(myScore[i][j]>max){
??				max=myScore[i][j];
??				u=i;
??				v=j;
??			}
??			else?if(myScore[i][j]==max){
??				if(computerScore[i][j]>computerScore[u][v]){
??					u=i;
??					v=j;
??				}
??			}
??			if(computerScore[i][j]>max){
??				max=computerScore[i][j];
??				u=i;
??				v=j;
??			}
??			else?if(computerScore[i][j]==max){
??				if(myScore[i][j]>myScore[u][v]){
??					u=i;
??					v=j;
??				}
??			}
??		}
??	}
??}
?
?oneStep(u,v,false);

//計算機(jī)落子
?chessBoard[u][v]=2;
for(var?k=0;k<count;k++){
			if(wins[u][v][k]){
				computerwin[k]++;
				mywin[k]=6;
				if(computerwin[k]==5){
					window.alert("計算機(jī)贏了");
????????????????????over=true;
				}
			}
		}
if(!over){
			me=!me;
			
		}
	}