# 计算一个图形中的三角形数目

```#!/usr/bin/python

"""
---------------------------------------------------------------------------------------------------
2015.07.23  Grey
***************************************************************************************************
Counter all the triangles in a picture
---------------------------------------------------------------------------------------------------
"""

import itertools,string

def CounterTriangle():
print "All the triangles we can find in the picture are as follows:"
triangle_number    = 0
dot_list           = []
i = 0
while i < 26:
dot_list.append(string.lowercase[i])
if string.lowercase[i] == 'k':
break
else:
i += 1
for each_combination in itertools.combinations(dot_list,3):
triangle_flag = True
for each_dot_combination in itertools.combinations(each_combination,2):
for each_side in sides_match_list:
if each_dot_combination[0] in each_side and each_dot_combination[1] in each_side:
triangle_flag = True
break
else:
triangle_flag = False
else:
triangle_flag = False
break
line_flag = False
for each_side in sides_match_list:
if each_combination[0] in each_side and each_combination[1] in each_side and each_combination[2] in each_side:
line_flag = True
if triangle_flag == True and line_flag == False:
triangle_number += 1
print "%d : %s" % (triangle_number,each_combination)
print "The number of triangles in the picture is : %d" % triangle_number

CounterTriangle()

```

0人收藏

0

0