#include<bits/stdc++.h>
using namespace std;
struct s{
  long double a;
  long double b;
  long double c=0;
  long double y;
  int f(long double a,long double b,long double c){
   c=a+b;
   return c;
}
};
s d;
int main()
{
    cin>>d.a>>d.b;
    d.y=d.f(d.a,d.b,d.c);
    cout<<d;
}

有什么问题！