How do I convert vector of strings into vector of integers in C++?

Question

I have a vector of strings. Need help figuring out how to convert it into vector of integers in order to be able to work with it arithmetically. Thanks!

#include         


        

Answer 1

Use boost::lexical_cast. And surround it with try-catch block.

try
{
   for (size_t i=0; i(vectorOfStrings[i]));
   }
}
catch(const boost::bad_lexical_cast &)
{
    //not an integer 
}

---

Or you can use Boost.Spirit parser (which someone claims is faster than even atoi()) as:

int get_int(const std::string & s)
{
    int value = 0;
    std::string::const_iterator first = s.begin();
    bool r = phrase_parse(first,s.end(),*int_[ref(value)=_1], space);
    if ( !r || first != s.end()) throw "error"; 
    return value;
}

//Usage
int value = get_int("17823");
std::cout << value << std::endl; //prints 17823

The full demo using your code : http://ideone.com/DddL7