add split string to vector int

bin/main.cpp

@@ -45,9 +45,12 @@ int main(int argc, char *argv[])
 {
   {// ex: string::split_str
     std::string str { "asdf,qwer,zxcv" };
+    std::string str_int { "1 2 3" };
     hack::string::v_str v = hack::string::split_str(str, ',');
+    auto v_int = hack::string::split_stoi(str_int, ' ');
     hack::log log;
     for (const auto& c : v) log(c);
+    for (const auto& c : v_int) log(c);
 
     std::string str_2 { "qqq,aaa:eee,ggg" };
     hack::string::v_str v_2 = hack::string::split_str(str_2, ",:");