T14/01/2019 ex2

#include <iostream>
#include <cmath>

using namespace std;

int main() {

 unsigned n,x,eprim,dif,d,difepr;
do {
        cout<<"nr sa fie par:"<<endl;
 cout<<"n=";cin>>n;
}while (n%2!=0);

  for (x=3;x<=n/2;x+=2)
  {
      eprim=1;d=2;
     while (d<=sqrt(x))
     {
         if (x%d==0)
          eprim=0;
         d++;
     }
       if (eprim)
  {
      dif=n-x;
      difepr=1;
      for (d=2;d<=dif/2;d++)
        if (dif%d==0)
         difepr=0;

         if (difepr) {
            cout<<"nr poate fi scris ca "<<x<<'+'<<dif<<endl;
            //break;
             }
    }
  }
 return 0;
}