Python程序练习题5.1-输出更大的田字格。

def drawsq(n):
    line=3*n+1
    for i in range(1,line+1):
        if i%3 ==1:
            print(n*"+----",end="")
            print("+")
        else:
            print("|    "*n,end="")
            print("|")
if __name__ == '__main__':
    n=eval(input("请输入阶数："))
    drawsq(n-1)