以 for 循环扫描矩阵，返回最小值、位置、总循环次数、比较次数

function find_min_with_count(a::AbstractMatrix)
isempty(a) && error("矩阵不能为空")
min_val = a[1, 1]
min_i, min_j = 1, 1
visits = 0 # 访问/循环次数（外层×内层总迭代数）
comparisons = 0 # 比较次数（执行 if 的次数）

for i in axes(a, 1)
    for j in axes(a, 2)
        visits += 1
        if !(i == 1 && j == 1)
            comparisons += 1
            if a[i, j] < min_val
                min_val = a[i, j]
                min_i, min_j = i, j
            end
        end
    end
end

return min_val, (min_i, min_j), visits, comparisons

end

示例

a = [8 5 6 9 4 5 6 1 5 -1]

min_val, pos, visits, comps = find_min_with_count(a)
println("最小值 = ", min_val, ", 位置 = ", pos)
println("总循环(访问)次数 = ", visits)
println("比较次数 = ", comps)