Прямой доступ к переменным

if(param == "pole_1")
    foo(&myStuct::pole_1);
else if
    ...

auto a = 5; //int
auto b = 5.0//double
auto c = 5f//float

int val = 42;
int &ref = val; // ref - синоним val
std::cout<<ref;

#include <map>
#include <string>
 
typedef map < std::string, int > str2val;
 
str2val values;
values["number"] = 42;
std::string ref = "number";
 
func(values[ref]);

int a = 2;
int* b = &a;
*b = 3; // a=3

#include <iostream>
#include <map>
#include <string>
using namespace std;
int main()
{
map<string, string> string_pair;
string_pair.insert(pair<string, string>("0","zero"));
string_pair.insert(pair<string, string>("1","one"));
string_pair.insert(pair<string, string>("2","two"));
map<string, string>::const_iterator were_it;
were_it = string_pair.find ("1");
cout <<"Key " << were_it->first << " Value " << were_it->second << endl;
system("pause") ;
return 0;
}

map <string, sometype> dict;
string_pair.insert(pair<string, sometype>("0","zero"));
string_pair.insert(pair<string, sometype>("1",42));

typedef map<std::string,boost::variant<int, std::string>> str2any