Printing lists with commas C++

Question

I know how to do this in other languages, but not C++, which I am forced to use here.

I have a Set of Strings that I\'m printing to out in a list, and they need a co

Answer 1

If the values are std::strings you can write this nicely in a declarative style with range-v3

#include 
#include 
#include 
#include 

int main()
{
    using namespace ranges;
    std::vector const vv = { "a","b","c" };

    auto joined = vv | view::join(',');

    std::cout << to_(joined) << std::endl;
}

For other types which have to be converted to string you can just add a transformation calling to_string.

#include 
#include 
#include 
#include 

int main()
{
    using namespace ranges;
    std::vector const vv = { 1,2,3 };

    auto joined = vv | view::transform([](int x) {return std::to_string(x);})
                     | view::join(',');
    std::cout << to_(joined) << std::endl;
}