Question

In C++ what would be the simplest way to create a temporary container to store a string and int like the C# dictionary where I can easily match the string key against another string and increase or decrease the entry value int ?

The content of the container would come from a string where each word separated by a space is an key entry, and all values of each key start with 0.

Dictionary<string, int> Options = new Dictionary<string, int>();
Options.Add("xyz", 0);
Options.Add("abc", 0);
Options.Add("dfg", 0);

Then I have to compare it against the user option, something like:

if (Options.ContainsKey(user_opt))
    Options[user_opt]++;

I was initially trying something with vectors but since my knowledge with C++ is barely 0 I am mostly stuck’ed at it.

With vectors this is what I got:

vector<string> Options;
boost::split(Options, m_StartMode, boost::is_any_of(" "));

Answer 1

Use std::map or std::unordered_map to store key, value.

std::map<std::string, int> Options;
Options.insert(std::make_pair("xyz", 0));
Options.insert(std::make_pair("abc", 1));

Then use map::find to check if key exists:

std::map<std::string,int>::iterator iter;
iter = Options.find(user_opt);

if(iter != Options.end())
   iter->second++;