cpp map of vectors code example

Example 1: map of maps c++

map <typename,map<typename,typename>> mp;
map[key1][key2]=values

Example 2: cpp vector structure

#include <vector>

typedef struct test1 {
  int a;
  char b;
} TOTO;

std::vector<TOTO> _v;

_v.push_back((TOTO){10, 'a'});
_v[0].a = 101;