莫勒定理,证明如下: 请结合下图看代码: #include <iostream> #include <math.h> #include <iomanip> using namespace std; #define pi acos(-1.0) double lawofcosine(double a, double b, double c) { return acos((a*a+b*b-c*c)/(2.0*a*b)); } double getangle(double x1…