一个典型的问题程序

#include <iostream>
using namespace std;
template <typename T>
T Div(T x,T y)
{
    return x/y;
}


int main()
{
    int x,y;
    double x1,y1;
    cin>>x>>y;    //y要是输入0，就玩完了
    cin>>x1>>y1;   //同上
    cout<<x<<"/"<<y<<"="<<Div(x,y)<<endl;
    cout<<x1<<"/"<<y1<<"="<<Div(x1,y1)<<endl;
    return 0;
}



再不用担心意外带来的不快了！


#include <iostream>
using namespace std;
template <typename T>
T Div(T x,T y)
{
    if(y==0)
        throw y;//抛出异常
    return x/y;
}


int main()
{
    int x=5,y=0;
    double x1=5.5,y1=0.0;
    try
    {
        //被检查的语句
        cout<<x<<"/"<<y<<"="<<Div(x,y)<<endl;
        cout<<x1<<"/"<<y1<<"="<<Div(x1,y1)<<endl;
    }
    catch(int)//异常类型
    {
        cout<<"除数为0,计算错误！"<<endl;//异常处理语句
    }
    catch(double)//异常类型
    {
        cout<<"除数为0.0,计算错误！"<<endl;//异常处理语句
    }
    return 0;
}