Question

我试图编造一个ud溶器,而我试图这样做的方式是拥有9x9个电线器的电网,该电线标有“set”物体的地址,这些物体要么放弃解决办法,要么具有可行的价值。

我能够先通过每栏两栏,然后进入下行和重复。

However, I m having a hard time imagining how I would designate which sub-grid (or box, block etc) a specific cell belongs to. My initial impression was to have if statements in the for loops, such as if row < 2 (rows start at 0) & col < 2 then we re in the 1st block, but that seems to get messy. Would there be a better way of doing this?

Answer 1

您可从行文中计算一个栏号:

int block = (row/3)*3 + (col/3);

这些数字是:

+---+---+---+
| 0 | 1 | 2 |
+---+---+---+
| 3 | 4 | 5 |
+---+---+---+
| 6 | 7 | 8 |
+---+---+---+

Answer 2

我将编制一个有81个条目的调查表。每一条目都指9x9电网中的电池,并向你提供所需信息(方框,一栏,行......)

Answer 3

我使用我的话(当时在座,假定X和0至9分):

int bx, by;
for (bx = (x/3)*3; bx < (x/3)*3 + 3; bx++) {
    for (by = (y/3)*3; by < (y/3)*3 + 3; by++) {
        // bx and by will now loop over each number in the block which also contains x, y
    }
}

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