一些小题<代码>

1.用传统方法计算一个数的二进制

1.只能计算小于2**16的数字

 i = 17
 num_2 = int(input("输入一个数字：").strip())
 while True:
     i -= 1
     if i < 0:
         break
     if 2 ** i > num_2:
         print(0,end="")
     else:
         print(1,end="")
         num_2 = num_2 - 2 ** i

2.用平常数学方法解

num_2 = int(input("输入一个数字：").strip())
l = []
while True:
    b = num_2 // 2
    a = num_2 % 2
    num_2 = b
    l.append(a)
    if b == 0:
        break
l.reverse()
for i in l:
    print(i,end="")

2.用特殊字符输出一个指定高和底的空心长方形

 gao = int(input("输入高：").strip())
 di = int(input("输入底").strip())
 count1 = 1
 while count1 <= gao:
     count2 = 0
     while count2 <= di:
         count2 += 1
         if 2 <= count1 < gao and 2 <= count2 <= di:
             print(" ",end="")
             continue
         print("#",end="")
     print()
     count1 +=1

结果：

3.用特殊字符实现LED灯效果

 a = "  ********"
 b = "  *       "
 c = "         *"
 d = "  *      *"
 num = [
     [a,d,d,d,d,d,a],
     [c,c,c,c,c,c,c],
     [a,c,c,a,b,b,a],
     [a,c,c,a,c,c,a],
     [d,d,d,a,c,c,c],
     [a,b,b,a,c,c,a],
     [a,b,b,a,d,d,a],
     [a,c,c,c,c,c,c],
     [a,d,d,a,d,d,a],
     [a,d,d,a,c,c,c]
 ]
 int1 = input("输入数字:")
 for i in range(7):
     for j in int1:
         print(num[int(j)][i], end="  ")
     print()

结果：