How do I use initializer lists with maps in C++11?

How do I use initializer lists with maps in C++11?

In C++11, you can use initializer lists to create maps easily. For example:

#include <map>
#include <string>

std::map<std::string, int> myMap = {
    {"apple", 1},
    {"banana", 2},
    {"cherry", 3}
};

This initializes a map with three key-value pairs.

Can I use other types as keys or values?

Yes, you can use any type that supports comparison as a key, and any type as a value. For example:

std::map<int, std::string> intStringMap = {
    {1, "one"},
    {2, "two"}
};

What happens if I try to insert a duplicate key?

If you insert a duplicate key, the new value will overwrite the existing value for that key. For example:

myMap["apple"] = 5; // This will change the value of "apple" to 5.