优化代码#include <cmath> class Triangle { private: Point A, B, C; public: Triangle(Point a, Point b, Point c) : A(a), B(b), C(c) {} float area() { float a = sqrt(pow(A.Getx()-B.Getx(), 2) + pow(A.Gety()-B.Gety(), 2)); float b = sqrt(pow(B.Getx()-C.Getx(), 2) + pow(B.Gety()-C.Gety(), 2)); float c = sqrt(pow(C.Getx()-A.Getx(), 2) + pow(C.Gety()-A.Gety(), 2)); float p = (a + b + c) / 2; return sqrt(p * (p-a) * (p-b) * (p-c)); } }; int main() { Point A(1, 2), B(3, 4), C(3, 0.5); Triangle t(A, B, C); float area = t.area(); return 0; }

这段代码已经很简洁和高效了，但是可以再做一些微小的优化，比如：

1. 在计算平方的时候使用“乘法”比使用“pow”函数更快：

float a = sqrt((A.Getx()-B.Getx())*(A.Getx()-B.Getx()) + (A.Gety()-B.Gety())*(A.Gety()-B.Gety()));

2. 在计算三角形面积的时候可以使用海伦公式：

float s = (a + b + c) / 2;
return sqrt(s * (s-a) * (s-b) * (s-c));

这样可以少计算一个平方根。最终优化后的代码如下：

#include <cmath>

class Triangle {
private:
    Point A, B, C;
public:
    Triangle(Point a, Point b, Point c) : A(a), B(b), C(c) {}

    float area() {
        float a = sqrt((A.Getx()-B.Getx())*(A.Getx()-B.Getx()) + (A.Gety()-B.Gety())*(A.Gety()-B.Gety()));
        float b = sqrt((B.Getx()-C.Getx())*(B.Getx()-C.Getx()) + (B.Gety()-C.Gety())*(B.Gety()-C.Gety()));
        float c = sqrt((C.Getx()-A.Getx())*(C.Getx()-A.Getx()) + (C.Gety()-A.Gety())*(C.Gety()-A.Gety()));
        float s = (a + b + c) / 2;
        return sqrt(s * (s-a) * (s-b) * (s-c));
    }
};

int main() {
    Point A(1, 2), B(3, 4), C(3, 0.5);
    Triangle t(A, B, C);
    float area = t.area();
    return 0;
}