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C++ Map Library - insert() Function
Description
The C++ function std::multimap::insert() extends multimap by inserting new element from initializer list. This function increases container size by one.
Declaration
Following is the declaration for std::multimap::insert() function form std::map header.
C++11
void insert (initializer_list<value_type> il);
Parameters
il − Initializer list.
Return value
None
Exceptions
No effect on container if exception is thrown.
Time complexity
Logarithmic i.e. O(log n)
Example
The following example shows the usage of std::multimap::insert() function.
#include <iostream> #include <map> using namespace std; int main(void) { /* Multimap with duplicates */ multimap<char, int> m { {'a', 1}, {'a', 2}, {'b', 3}, }; m.insert({{'c', 4}, {'d', 5}}); cout << "Multimap contains the following elements:" << endl; for (auto it = m.begin(); it != m.end(); ++it) cout << it->first << " = " << it->second << endl; return 0; }
Let us compile and run the above program, this will produce the following result −
Multimap contains the following elements: a = 1 a = 2 b = 3 c = 4 d = 5
map.htm
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