module: Main
    import: os
    function: main
        return_type: void
        body:
            loop:
                init:
                    declare outer_i: int = 1
                cond:
                    outer_i <= 10
                step:
                    outer_i = outer_i + 1
                body:
                    print(outer_i)

                    loop:
                        init:
                            // 注意这一行使用了外层循环的变量 outer_i
                            declare inter_j: int = outer_i
                        cond:
                            inter_j <= 10
                        step:
                            inter_j = inter_j + 1
                        body:

                        end body
                    end loop

                end body
            end loop
        end body
    end function
end module