C++ Multidimensional string array initialization (std::map) -


i have special array of strings in c++:

#include <map> #include <string>  std::map<std::string, std::map<int, std::string>> oparam; oparam["pa"][0] = "a"; oparam["pa"][1] = "b"; oparam["pa"][2] = "c"; oparam["pb"][0] = "x"; oparam["pb"][1] = "y"; oparam["pb"][2] = "z";

but initialize initialization list, this:

std::map<std::string, std::map<int, std::string>> oparam{     { "pa", { "a", "b", "c" } },     { "pb", { "x", "y", "z" } }, };

but giving me error. missing brackets?

if integers acting keys in internal map going contiguous, use vector instead:

std::map<std::string, std::vector<std::string>> oparam;

with that, initialization you've given should work.

if continue use std::map instead, you'll have couple of things. first, supports sparse keys, you'll need specify key each string want insert. second, you'll need enclose items insert 1 map in braces, this:

std::map<std::string, std::map<int, std::string>> oparam {     { "pa", { { 0, "a" }, { 1, "b" }, { 2, "c" } } },     { "pb", { { 0, "x" }, { 1, "y" }, { 2, "z" } } } };

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