csu1812 题意 求三角形和矩形交的面积. 分析 半平面交.把三角形的三条边当作直线去切割矩形,最后求切割后的多边形面积即可. code #include<algorithm> #include<cstdio> #include<cmath> #include<cstring> using namespace std; const double eps = 1e-8; int sgn(double x) { // 误差 if(fabs(x) < e…

检验半平面交的板子. #include <stdio.h> #include <bits/stdc++.h> using namespace std; #define gg puts("gg"); #define ll long long ); ; int dcmp(double x){ ; ? : -; } struct Point{ double x, y; Point(, ):x(x), y(y){} Point operator +(const Poin…

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