4．检查哪方胜利的程序
检查哪方胜利的程序如下：
function check_win(row, col, val) {
var i = col, count = 0;
// 先检查行连成四子
while (_root.chess[row][i] == val and i>=0) {
count++;
i--;
}
if (count>=4) {
return true;
}
i = col+1;
while (_root.chess[row][i] == val and i<=6) {
count++;
i++;
}
if (count>=4) {
return true;
}
// 再检查列连成四子
count = 0;
i = row;
while (_root.chess[i][col] == val and i<=5) {
count++;
i++;
}
if (count>=4) {
return true;
}
// 检查左高斜线
count = 0;
i = row;
j = col;
while (_root.chess[i][j] == val and i>=0 and j>=0) {
count++;
i--;
j--;
}
if (count>=4) {
return true;
}
i = row+1;
j = col+1;
while (_root.chess[i][j] == val and i<=5 and j<=6) {
count++;
i++;
j++;
}
if (count>=4) {
return true;
}
// 检查右高斜线
count = 0;
i = row;
j = col;
while (_root.chess[i][j] == val and i>=0 and j<=6) {
count++;
i--;
j++;
}
if (count>=4) {
return true;
}
i = row+1;
j = col-1;
while (_root.chess[i][j] == val and i<=5 and j>=0) {
count++;
i++;
j--;
}
if (count>=4) {
return true;
}
}
