摘要：
题目链接：http://poj.org/problem?id=2546DescriptionYour task is to write a program, which, given two circles, calculates the area of their intersection with the accuracy of three digits after decimal point.InputIn the single line of input file there are space-separated real numbers x1 y1 r1 x2 y2 r2. T.. 阅读全文