Complete the isInt() function which returns true if a token can be converted to an int and false otherwise. You will need to use a string stream. After trying to convert, the streams fail bit will...

Complete the isInt() function which returns true if a token can be converted to an int and false otherwise. You will need to use a string stream. After trying to convert, the streams fail bit will be false, and its eof bit will be true.

#include
#include
#include
using namespace std;

bool isInt(const string& token)
{

...

}