請問c++的例外處理

#include <iostream>
#include <stdlib.h>
using namespace std;
class fraction{
  private:
   int numerator;
   int denominator;
  public:
  void set_value()
  {cout << "輸入分子:";
  cin >> numerator;
  cout << "輸入分母:";
  cin >> denominator; }

  void print_value()
  {
  //new
  try     {
 cout << numerator << "/" << denominator << "=";
    cout << (numerator/denominator) << endl;     ;
    }
 catch (std::exception& e)     {
    cout << "例外發生: " << e.what() << endl;

    }}
};
int main()
{  fraction X;
   X.set_value();
   X.print_value();
   system("pause");
   return 0;}

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