浮点异常不可捕获

浮点异常有问题。当我除以零时，我得到这个异常。我试图抓住它，但互联网上的解决方案对我不起作用。

#include<iostream>
using namespace std;
int main(){
double h{0};
int a{0},b{0},c{0};
cin.exceptions(ios_base::failbit);
cout << "Enter Values: ";
try{ 
  cin >> a >> b >> c;  
  h = (3/1/a+1/b+1/c);      
if(a == 0 || b == 0 || c == 0){
 throw overflow_error("Division by zero is not allowed!");
}
  cout << h;
}
catch(overflow_error e){
     cerr << e.what();
 }
 catch(exception& e){
     cerr << "Only numbers!";
 }
 catch(...){
    cerr << "?";
}
return 0;
}