Lua矩阵乘法：三重循环的行列内积

local function matMul(A, B)
    local m, n, q = #A, #A[1], #B[1]
    if #B ~= n then return nil end
    local C = {}
    for i = 1, m do
        C[i] = {}
        for j = 1, q do
            local s = 0
            for k = 1, n do
                s = s + A[i][k] * B[k][j]
            end
            C[i][j] = s
        end
    end
    return C
end

local A = {{1, 2}, {3, 4}}
local B = {{5, 6}, {7, 8}}
local C = matMul(A, B)
local p = getplayerbyname("mat01")
for i = 1, 2 do
    sendmsg(p, 1, table.concat(C[i], ","))
end