小程序

判断一个数是否为素数

def sushu(n):
    import math
    k =int(math.sqrt(n))
    for i in range(2,k+1):
        if n%i == 0:
            print("%d不是一个素数"% n)
        else:
            i = i+1
            if (i>k):
                print("%d是一个素数"% n)
            if (i<=k):
                print("%d不是一个素数"% n)
while(True):
    num = int(input("请输入一个数："))
    sushu(num)

如果6:52离家，慢速（6分10s/千米）跑1.6km,接下来以4分30秒/千米的速度跑4.8千米，请问回家吃早餐是什么时候？

x1 = 1.6*(60*6+10)*2
x2 = 4.8*(60*4+30)*2
x3 = 1.6*(60*6+10)*2
x = x1 + x2 + x3
print(x)
duration_minute = int(x/60)
print(duration_minute)
duration_second = x%60
print(duration_second)
start_hour = 6
start_minute = 52
start_second = 0
add_minute = duration_minute + start_minute
add_second = duration_second + start_second
while (add_second>60):
    add_second -=60
    add_minute +=1
while (add_minute>60):
    add_minute -=60
    start_hour +=1   
print(start_hour,add_minute,add_second)  

编写一个函数，接收字符串形参s，并打印足够的空白，以达到最后一个字符显示在70列

def right_justy(s):
    print(" "*69+s)
    print(len(" "*69+s))
right_justy("monty")

修改do_twice，让他接受两个实参，一个是函数对象，另一个是一个值，它会调用函数对象两次，并传入那个值作为实参

使用修改版的do_twice 来调用print_twice两次，并传入实参spam

定义一个新函数do_four接受一个函数对象和一个值，使用这个值作为实参调用函数4次，这个函数体应该只有两条语句，不是4条

#def print_spam(t):
#    print('spam'*t)
#def do_twice(print_spam,s):
#    print_spam(s)
#    print_spam(s)
#do_twice(print_spam,2)

#def print_twice(bruce):
#    print(bruce)
#    print(bruce)
#def do_twice(print_twice,s):
#    print_twice(s)
#    print_twice(s)
#do_twice(print_twice,'spam')

def print_spam():
    print('spam')
def do_four(print_spam,s):
    for i in range(s):
        print_spam()
do_four(print_spam,4)