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Implementing Multidimensional Map in C++

Last Updated : 12 Jul, 2025
Multidimensional maps are used when we want to map a value to a combination of keys. The key can be of any data type, including those that are user-defined. Multidimensional maps are nested maps; that is, they map a key to another map, which itself stores combinations of key values with corresponding mapped values. Syntax: 
// Creating a two-dimensional map:
map< key_1_type, map< key_2_type, value_type> > object;

// Creating an N-dimensional map:
map< key_1_type, map< key_2_type, ... map< key_N_type, value_type> > > object;
Example 1:
Output: 
First key is 0 And second key is 0 And value is 0
First key is 0 And second key is 1 And value is 1
First key is 1 And second key is 0 And value is 1
First key is 1 And second key is 1 And value is 2

Now accessing map though iterator 

First key is 0 And second key is 0 And value is 0
First key is 0 And second key is 1 And value is 1
First key is 1 And second key is 0 And value is 1
First key is 1 And second key is 1 And value is 2
Example 2:
Output: 
First key is Geek And second key is 1 And value is 10
First key is Geek And second key is 2 And value is 20
First key is Noob And second key is 0 And value is 5
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