#coding:utf-8

#写一个四行四列的小网格绘制的程序。

def draw_grid(rows, columns):

def do_four(f, arg):# f 调用print_it

f(arg)

f(arg)

f(arg)

f(arg)

def print_it(string):

print (string)

def print_line():

start_hline = "+ - - - - +"

add_hline = " - - - - +"

print (start_hline + add_hline * (columns-1)) #打印横线

def print_row():

start_row = "| |"

adj_col_row = " |"

do_four(print_it, (start_row + adj_col_row * (columns-1))) #竖线

def init_grid():

print_line()

print_row()

print_line()

def add_grid():

print_row()

print_line()

print_row()

print_line()

print_row()

print_line()

init_grid()

add_grid()

draw_grid(4,4)