How do I binary search with algorithms with std::map?

Binary search is a search algorithm that finds the position of a target value within a sorted array or collection. In C++, the std::map is a sorted associative container that stores key-value pairs. This makes it easy to perform searches efficiently, much like a binary search.

Here’s an example of how you can use std::map for searching a value:

#include #include int main() { // Create a map with key-value pairs std::map myMap; myMap[1] = "One"; myMap[2] = "Two"; myMap[3] = "Three"; myMap[4] = "Four"; // The target key we want to search for int targetKey = 3; // Use the find method to search for the target key std::map::iterator it = myMap.find(targetKey); // Check if the key was found if (it != myMap.end()) { std::cout << "Found key " << targetKey << ": " << it->second << std::endl; } else { std::cout << "Key " << targetKey << " not found." << std::endl; } return 0; }

binary search std::map C++ search algorithm associative container

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