蛇形方阵

？   ５
     １     ３     ４   １０   １１
     ２     ５     ９   １２   １９
     ６     ８   １３   １８   ２０
     ７   １４   １７   ２１   ２４
   １５   １６   ２２   ２３   ２５

CLS : INPUT m: DIM a(m, m): k = 0
FOR x = 1 TO m ,x为按蛇形前进的路径上的斜线编号
IF x MOD 2 = 0 THEN
th = m: tl = m + 1 - x 'th、tl分别为编号为x的斜线的起始位置坐标
FOR i = 1 TO x '编号为x的斜线上，有x个单元
k = k + 1: a(th, tl) = k: th = th - 1: tl = tl + 1
NEXT i '此for语句是为了往x号斜线经过的单元填数
ELSE '偶数号斜线上，沿箭头方向，行号递减，列号递增
th = m + 1 - x: tl = m
FOR i = 1 TO x
k = k + 1: a(th, tl) = k: th = th + 1: tl = tl - 1
NEXT i
END IF
NEXT x
'以上为右下三角形矩阵范围内的程序，以下为左上角部分，解释几乎相同（略）
FOR x = m - 1 TO 1 STEP -1
IF x MOD 2 = 0 THEN
th = x: tl = 1
FOR i = 1 TO x
k = k + 1: a(th, tl) = k: th = th - 1: tl = tl + 1
NEXT i
ELSE
th = 1: tl = x
FOR i = 1 TO x
k = k + 1: a(th, tl) = k: th = th + 1: tl = tl - 1
NEXT i
END IF
NEXT x
FOR i = 1 TO m
FOR j = 1 TO m
PRINT USING "###"; a(i, j);
NEXT j: PRINT
NEXT i
END

公式：
CLSINPUT NDIM TR(N, N)TR(1, 1) = 1: TR(N, N) = N * N
FOR I = 1 TO N - 1
IF I MOD 2 = 1 THEN
FOR J = 0 TO I
TR(I + 1 - J, 1 + J) = TR(I, 1) + 1 + J
TR(N - I + J, N - J) = TR(N - I + 1, N) - 1 - J
NEXT J
ELSE
FOR J = 0 TO I
TR(1 + J, I + 1 - J) = TR(1, I) + 1 + J
TR(N - J, N - I + J) = TR(N, N + 1 - I) - 1 - J
NEXT J
END IF
NEXT I
FOR I = 1 TO N
fOR J = 1 TO N
PRINT USING "###"; TR(I, J);
NEXT J
PRINT
NEXT I
end

自编的蛇型
CLS
INPUT "JI CHENG JI:",N
DIM A(N*2,N*2)
DO
BJ=BJ+1
IF BJ>N THEN M=M-((BJ-N)*2-1)
FOR I=1 TO BJ
M=M+1:C=BJ-I+1
IF I MOD 2=0 THEN A(I,C)=M ELSE A(C,I)=M
NEXT I
LOOP UNTIL M>=N*N
FOR I=1 TO N
FOR J=1 TO N
PRINT USING"####";A(I,J);
NEXT J
PRINT
NEXT I
END