如果角度为“a”，则遵循此规则 -
示例#include <iostream>#include <cmath>using namespace std;class plane{ private: double a, b, c, d; public: plane(double a = 0, double b = 0, double c = 0, double d = 0){ this->a = a; this->b = b; this->c = c; this->d = d; } double friend angle(plane p1, plane p2);};double angle(plane p1, plane p2){ double nume = (p1.a * p2.a) + (p1.b * p2.b) + (p1.c * p2.c); double deno1 = (p1.a * p1.a) + (p1.b * p1.b) + (p1.c * p1.c); double deno2 = (p2.a * p2.a) + (p2.b * p2.b) + (p2.c * p2.c); return (180.0 / 3.14159) * acos(nume/ (sqrt(deno1) * sqrt(deno2)));}int main() { plane p1(2.0, 2.0, -3.0, -5.0), p2(3.0, -3.0, 5.0, -6.0); cout << "angle: " << angle(p1, p2) << " degree";}
输出angle: 123.697 degree
以上就是在c程序中，将以下内容翻译为中文：3d中两个平面的夹角的详细内容。