C++ try catch

头文件：#include <stdexcept>

double divideNumbers(double a,double b)
{
    if(b==0)
    {
        throw std::exception("No zero");
    }
    return a/b;
}

int main()
{
    try
    {
        cout<<divideNumbers(100,5)<<std::endl;
        cout<<divideNumbers(9,0)<<std::endl;
    }
    catch(const std::exception& ex)
    {
        cout<<ex.what()<<endl;
    }
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