k2hash_sample.cpp https://github.com/yahoojapan/k2hash/wiki/Developer_jpn#-k2hshmクラス

k2hash_sample.cpp

#include<iostream>
#include<fstream>
#include<sstream>
#include <k2hash/k2hash.h>
#include <k2hash/k2hshm.h>
using namespace std;

int main(){
K2HShm k;
cout << k.GetSystemPageSize() << endl;

bool isCppCreated = k.Create("/tmp/testcpp.k2h");
cout<<(isCppCreated ? "already ..." : "now created!")<<endl;

k.Attach("/tmp/testcpp.k2h",false);
k.Set("tako", "僕は磯に住むタコだよ🐙");
k.Set("ika", "僕は磯に住むイカだよくコ:彡");
cout << k.GetSystemPageSize() << endl;
cout << k.GetK2hashFilePath() << endl;
cout << k.Get("tako") << endl;
cout<<(k.Get("tako") ? "GET" : "NOT GET")<<endl;

ifstream ifs("yubin.csv");
string s,out;
while(getline(ifs,s)){
    stringstream ss(s);
    vector<string> vs;
    while(getline(ss, out, ',')) vs.push_back(out);
    const char* key = &vs[0][0];
    const char* val = &vs[1][0];
    k.Set(key,val);
}

cout << k.Get("\"4100004\"") << endl;

k.Detach();
cout<<(k.Get("tako") ? "GET" : "NOT GET")<<endl;

}

https://qiita.com/monhan/items/443b2bf8d9ff094215dc