Python 练习实例61
最后更新于：2022-03-27 01:25:24
Python 练习实例61
Python 100例题目：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：
实例
#!/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
# -*- 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(‘ ‘)
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