Comma separated floats in C++

Question

I am trying to separate a list of numbers such as: 34,45,12.3,100,34.6,50

I can do it only if there are no decimals like this:

#include <vector>
#include <string>
#include <sstream>
#include <iostream>

int main()
{
    std::string str = "34,45,12.3,100,34.6,50";
    std::vector<int> vect;

    std::stringstream ss(str);

    int i;

    while (ss >> i)
    {
        vect.push_back(i);

        if (ss.peek() == ',')
            ss.ignore();
    }

    for (i=0; i< vect.size(); i++)
        std::cout << vect.at(i)<<std::endl;

}

The problem here is with the decimals. The above will produce:

34 45 12 3 100 34 6 50

while it should produce:

34 45 12.3 100 34.6 50

basically the above code when it sees a dot '.' it acts as if it was a comma.

Any ideas?

Answer 1

You should use a float and change the code to use float instead of int:

#include <vector>
#include <string>
#include <sstream>
#include <iostream>

int main()
{
    std::string str = "34,45,12.3,100,34.6,50";
    std::vector<float> vect;

    std::stringstream ss(str);

    float i;

    while (ss >> i)
    {
        vect.push_back(i);

        if (ss.peek() == ',')
        ss.ignore();
    }

    for (i=0; i< vect.size(); i++)
    std::cout << vect.at(i)<<std::endl;

}

Answer 2

You should declare float i instead of int i and declare the vector as a vector of floats instead of a vector of integers. This is because 12.4 is not an integer, but a float.

Answer 3

I think your code interprets 12.3 as two different numbers because you haven't declared that number as a float. You vector holds all of the strings as integers, and not floats. If you declared your vectors as floats instead of integers, then your problem should be solved