基本编程练习第二波

1、用* 表示一个三角形

 1 ## 倒三角形
 2 line = 5
 3 
 4 while line > 0:
 5     i = line
 6     while i > 0:
 7         print('*',end="")
 8         i -= 1
 9     print()
10     line -= 1
11 
12 ## 正三角形
13 
14 line = 1
15 
16 while line<=5:
17     i = line
18     while i>0:
19         print('*',end="")
20         i -= 1
21     print()
22     line += 1
23 ## 正三角形
24 
25 line = 1
26 
27 while line <=5:
28     tmp = 1
29     while tmp <= line:
30         print('*',end='')
31         tmp += 1
32     print()
33     line += 1

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2、用*表示一个长方形

 1 #_author:Administrator
 2 #date: 2018/1/6
 3 
 4 height = int(input('高：'))
 5 width = int(input('宽：'))
 6 
 7 # num_height = 1
 8 # while num_height <= height:
 9 #     num_width = 1
10 #     while num_width <= 
11 #         print("*",end="")
12 #         num_width += 1
13 #     print()
14 #     num_height += 1
15 
16 while height > 0:
17     num_width = width
18     while num_width > 0:
19         print('*',end='')
20         num_width -= 1
21     print()
22     height -= 1

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3、九九乘法表

1 fst = 1
2 
3 while fst <= 9:
4     sec = 1
5     while sec <= fst:
6         print( str(fst)  +'*' +str(sec) + '=' +str(sec * fst), end='	')
7         sec += 1
8     print()
9     fst += 1

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为什么要坚持，想一想当初！