#include <stdio.h>
#include <math.h>

struct Vec2d {
  double x;
  double y;
};

struct Vec2d getCoords(double Winkel) {
  struct Vec2d erg;
  erg.x = cos(Winkel);
  erg.y = sin(Winkel);
  return erg;
}

int main() {
  double winkel[] = {0.0,45.0,90.0,135.0,180.0,360.0}; 
  int max = sizeof(winkel)/sizeof(double);
  for(int i=0;i < max;i++){
    double winkel_rad=(winkel[i] * (0.0174533)); // double at end represents est of 1 degree in radian
    struct Vec2d erg = getCoords(winkel_rad);
     printf("Pos of %lf  is x=%lf and y=%lf \n",winkel[i],erg.x,erg.y);
  }
}