ugly converter, very ugly

#include <iostream>
#include <sstream>
using namespace std;

string shortenedDouble(double number)
{
    ostringstream strs;
    strs << number;
    string shortened = strs.str(); //take a string from our ostringstream
    int dot_location;
    dot_location = shortened.find('.');
    if (dot_location == -1){return shortened;} //if dot not found at all
    else{return shortened.substr(0, dot_location+2);}

}

int main()
{
    double a = 4.2342;
    double b = 3.42221;
    double c = 33.123;

    cout << shortenedDouble(a) << endl;
    cout << shortenedDouble(b) << endl;
    cout << shortenedDouble(c) << endl;
    return 0;
}