“map” template class: Type name for “map” of type “KeyType” elements to “T” elements is “map<KeyType, T>” or “map<KeyType, T, Ordering>” The “Ordering” is used to sort the values by using the key value. If no “Ordering” is given, the ordering used is the binary operator “<”. The library header for “map” is “<map>”. It places the definition in the “std” namespace. Defined type for “map” is given below: “key_type” is used to represents the type of the key values. “mapped_type” is used to indicate the type of the values mapped to. “size_type” is used to represent the type of the size. The iterators are used in the “map” template class is “iterator”, “const_iterator”, “reverse_iterator” and “const_reverse_iterator”. The “map” template class uses the pair template class. The pair template is used to store the association between the key and a data item. Example: “map<string, int> numMap;” Using the above example, user can add a mapping from “c++” to the number “8” by using “[]” operator. Example for the above statement is “numMap["c++"] = 8;”.

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Chapter 18.2, Problem 14STE

Program Plan Intro

“map” template class:

Type name for “map” of type “KeyType” elements to “T” elements is
“map<KeyType, T>” or “map<KeyType, T, Ordering>”

The “Ordering” is used to sort the values by using the key value.

If no “Ordering” is given, the ordering used is the binary operator “<”.

The library header for “map” is “<map>”.

It places the definition in the “std” namespace.

Defined type for “map” is given below:

“key_type” is used to represents the type of the key values.

“mapped_type” is used to indicate the type of the values mapped to.

“size_type” is used to represent the type of the size.

The iterators are used in the “map” template class is “iterator”, “const_iterator”, “reverse_iterator” and “const_reverse_iterator”.

The “map” template class uses the pair template class.

The pair template is used to store the association between the key and a data item.

Example: “map<string, int> numMap;”

Using the above example, user can add a mapping from “c++” to the number “8” by using “[]” operator.

Example for the above statement is “numMap["c++"] = 8;”.

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