python基础例子--菜单项

---菜单项

while True:
    print "--------------"
    print "1、取5个数的和"
    print "2、取5个数的平均值"
    print "X、退出"
    it=raw_input("请输入菜单项：")
    if it=='1':
        s=0
        for i in range(5):
            num=raw_input("请输入第%d个数：" % (i+1))
            s+=int(num)
        print "总和：",s
        continue
    elif it=='2':
        s=0
        for i in range(5):
            num=raw_input("请输入第%d个数：" % (i+1))
            s+=int(num)
        print "平均数：",int(s)/5
    elif it=='X' or it=='x':
        break
    else:
        print "error:不是指定的菜单项\n"