How to deal with EOF ?

I thought it would be simple.. but couldn't come up with a solution.
How would I stop the following program from entering an Infinite loop when it gets an eof ?

Code:

#include<iostream>
#include<string>
int main()
{
    std::string str;
    while(true)
    {
        std::cout<<"Input: ";
        std::getline(std::cin,str);
        std::cout<<str<<std::endl;
    }
    return 0;
}

Well one way is to use exceptions:

Code:

cin.exceptions (ios::eofbitif||ios::failbit | ios::badbit)

Another way is a simple break:

Code:

if(!std::getline(std::cin,str)) break;