Tuenti Contest 1 (Pablo Moreno)

/*
    Author: Pablo Moreno Olalla
    Email address: darthbrevu@yahoo.es
*/
#include "BigNumber.h"

#include <list>
#include <cstdio>
#include <string>
#include <iostream>
#include <algorithm>

using namespace std;

//These functions are going to be called just at one point in the code.
//So there's no loss in inlining them, although they aren't very small.
inline void tokenize(const string &str,list<string> &out,char chr=' ')  {
    //This could alse have been achieved using objects from the sstream header, but this is safer.
    string::size_type pos=0;
    string::size_type pos2;
    size_t N=str.length();
    while (pos<N&&pos!=string::npos)    {
        pos=str.find_first_not_of(chr,pos);
        if (pos==string::npos) break;
        pos2=str.find_first_of(chr,pos);
        out.push_back(str.substr(pos,pos2-pos));
        pos=pos2;
    }
}

inline void funString(const string &str)    {
    //This function reads a line and adds the numbers contained there, and then shows the result.
    list<string> substrs;
    tokenize(str,substrs);
    Number res=0;
    bool anyNumber=false;
    for (list<string>::const_iterator it=substrs.begin();it!=substrs.end();++it) try    {
        res+=Number(*it);   //This may raise an exception if the string pointed by it does not contain a number.
        anyNumber=true;
    }   catch (const runtime_error &)   {}  //Not a number? Well... let's just ignore it and continue adding ;).
    if (anyNumber) cout<<static_cast<string>(res)<<endl;    //No numbers? Then let's just not show anything.
}

int main(int argc,char **argv)  {
    //The first two lines are not strictly necessary, but make the code a little more handy.
    if (argc>=2) freopen(argv[1],"r",stdin);
    if (argc>=3) freopen(argv[2],"w",stdout);
    string tmp;
    do  {
        getline(cin,tmp);
        funString(tmp);
    }   while (!cin.eof());
    return 0;
}