# -*- coding: UTF-8 -*-
'''
【程序61】
题目:打印出杨辉三角形(要求打印出10行如下图)
1.程序分析:
'''
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(a[i][j])
stdout.write(' ')
print
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