题目:打印出杨辉三角形(要求打印出10行如下图)。 程序分析:无。 程序源代码: - #!/usr/bin/python
- # -*- coding: UTF-8 -*-
-
- if __name__ == '__main__':
- a = []
- for i in range(10):
- a.append([])
- for j in range(10):
- a[i].append(0)
- for i in range(10):
- a[i][0] = 1
- a[i][i] = 1
- for i in range(2,10):
- for j in range(1,i):
- a[i][j] = a[i - 1][j-1] + a[i - 1][j]
- from sys import stdout
- for i in range(10):
- for j in range(i + 1):
- stdout.write(str(a[i][j]))
- stdout.write(' ')
- print
以上实例输出结果为: - 1
- 1 1
- 1 2 1
- 1 3 3 1
- 1 4 6 4 1
- 1 5 10 10 5 1
- 1 6 15 20 15 6 1
- 1 7 21 35 35 21 7 1
- 1 8 28 56 70 56 28 8 1
- 1 9 36 84 126 126 84 36 9 1
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