#include <iostream>
#include <map>
int main() {
// Step 1: Declare a map with key-value pairs of type int and string
std::map<int, std::string> myMap;
// Step 2: Insert key-value pairs into the map
myMap.insert(std::make_pair(1, "One"));
myMap.insert(std::make_pair(2, "Two"));
myMap.insert(std::make_pair(3, "Three"));
// Step 3: Access elements using the [] operator
std::cout << "Value at key 2: " << myMap[2] << std::endl;
// Step 4: Check if a key exists in the map
if (myMap.find(3) != myMap.end()) {
std::cout << "Key 3 exists in the map." << std::endl;
}
// Step 5: Iterate through the map using iterators
std::cout << "Map elements: ";
for (auto it = myMap.begin(); it != myMap.end(); ++it) {
std::cout << "(" << it->first << ", " << it->second << ") ";
}
std::cout << std::endl;
// Step 6: Erase an element by key
myMap.erase(2);
// Step 7: Check if the map is empty
if (myMap.empty()) {
std::cout << "Map is empty." << std::endl;
} else {
std::cout << "Map is not empty." << std::endl;
}
// Step 8: Clear all elements from the map
myMap.clear();
return 0;
}