Untitled

Get next float from an istream?
Data.txt:
blah blah blah blah blah
blah blah blah blah blah
blah 0.94 blah blah blah

std::istream inputFile(Data.txt);
float myNumber = inputFile.GetNextFloat();

std::cout << myNumber << std::endl; // Prints "0.94"

#include <iostream>
#include <string>
#include "boost/regex.hpp"
namespace re = boost;

int main()
{
    re::regex floatre("^[^-+0-9]*([-+]?[0-9]+\.[0-9]+)(.*)");
    for (std::string line; std::getline(std::cin, line); )
    {
        re::smatch results;
        while (re::regex_match(line, results, floatre))
        {
            std::cout << "  float='" << results[1] << "'n";
            line = results[2];
        }
    }
}