unordered_map<char, char> pairs = { {')', '('}, {']', '['}, {'}', '{'}

};This is an example of how to initialize an unordered map in C++ using an initializer list. The map is called "pairs" and contains mappings between closing and opening brackets. For example, the mapping for ')' is to the corresponding opening bracket '('. The curly braces {} contain the key-value pairs separated by commas.