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2826：An Easy Problem?!

题目描述
It's raining outside. Farmer Johnson's bull Ben wants some rain to water his flowers. Ben nails two wooden boards on the wall of his barn. Shown in the pictures below, the two boards on the wall just look like two segments on the plane, as they have the same width.

Your mission is to calculate how much rain these two boards can collect.
输入解释
The first line contains the number of test cases.
Each test case consists of 8 integers not exceeding 10,000 by absolute value, x1, y1, x2, y2, x3, y3, x4, y4. (x1, y1), (x2, y2) are the endpoints of one board, and (x3, y3), (x4, y4) are the endpoints of the other one.
输出解释
For each test case output a single line containing a real number with precision up to two decimal places - the amount of rain collected.
输入样例 
2
0 1 1 0
1 0 2 1

0 1 2 1
1 0 1 2
输出样例 
1.00
0.00
该题目是Virtual Judge题目，来自 北京大学POJ
题目来源 POJ Monthly--2006.04.28, Dagger@PKU_RPWT
源链接： POJ-2826
最后修改于 2020-10-29T06:45:15+00:00 由爬虫自动更新
共提交 0 次
通过率 --%
时间上限 内存上限
1000 65536