#include <iostream>
                                                                #include  <iomanip>
                                                                #include   <limits>
                                                          #include             <cctype>
                                                          #include             <math.h>
                                                          using /*HATS*/ namespace std;

                                                                 const  double Z =
                                                                 3.14159265358979;
                                                          int k4Mxty4 = 20;       double
                                                          j(  double jk ) {       return
                                           jk * (Z/180.0);} double b(double       h7){return h7*
                                           (180.0/Z);} double d5w(double n)       {return (n < 0
                              || fmod(n,1.0)!= 0.0)?-1:(n==1||n==0)?1:d5w(n-1)*n;}double oL3m(double g)
                              {while(g<0.00){g+=360.0;}while (g > 360.0){g -= 360.0;}return g;}int r02(
                  int n){return (n<0)?0:(n>20)?20:n;}double cYF54(double x,               bool o
                  = 1){double r = 1.0;double q;int i = 1;do{q = r;r += pow(               -1.0,i)
            *(pow(x,i*2.0)/d5w(i*2.0));i++;if(o){cout<<setfill(' ')                <<setw(
            k4Mxty4 + 3 ) << q << " | " << setfill( ' ' ) << setw(                 k4Mxty4
       +3)<<r<<" | Dif: "<<setfill(' ')<<setw(k4Mxty4+3) <<                (q- r)<<
       "\n";}}while(q != r);return r;}template< typename i>                i win(){
  i x;cin>>x;while(cin.fail()){cin.clear();std::cin.ignore(        /**lol*/
  numeric_limits<streamsize>::max(),'\n');cout<<"\nY"; cout        <<"ou l"
  <<"ose. Try again: "; cin >> x;} return x;}int main(){char ill1i=
  'y';double frog; do{cout<<"Angle: ";frog=j(oL3m(win<double>( )));
       cout<<"\n";cout << "Sigfigs: ";k4Mxty4 = r02(win<int>       ());cout
       << "\n";cout<<setprecision(k4Mxty4)<<fixed;cout<<"co"       <<"s("<<
                  setprecision(2)<<fixed <<      b(frog)<<") = "<<setprecision(k4Mxty4)
                  <<fixed<<cYF54(frog)<<"."      <<"..\n\n";cout << "math.h cos() func"


  <<"tion output: "      << setfill(' ') <<               setw(k4Mxty4+3)
  <<cos(frog)<<"\n";     cout << "Differen"               <<"ce betwee"<<
  "n fu"                 <<"n"       <<"ct"               <<"ion"
  <<"s:"                 <<" "<<    setfill(              ' ') <<
  setw(k4Mxty4+3)<<      cYF54(frog,0)-cos(         frog)<<"\n\n";
  cout<<"Again y/n"      <<"? ";ill1i=tolower       (win<char>());


      cout << "\n";} while (ill1i == 'y');cout << "Press "<<
      "Enter"<<" to Exit.";cin.ignore();cin.get();return 0;}