CPP/Math/Trig

Trig.cpp

#include <cmath>
#include <iostream>
 
int main()
{
  double x1 = 0;
  double y1 = 0;
  double x2 = 100;
  double y2 = 100;
 
  std::cout << 180./3.14159 * atan((x2-x1)/(y2-y1)) << std::endl;
  return 0;
}