iterate over map c++17
To iterate over a map in C++17, you can use a range-based for loop. Here is the code snippet:
std::map<KeyType, ValueType> myMap;
for (const auto& pair : myMap) {
const KeyType& key = pair.first;
const ValueType& value = pair.second;
// Your code here
}
Explanation:
1. We define a map called myMap
with the desired key and value types.
2. We use a range-based for loop to iterate over each element in the map. The loop variable pair
represents each key-value pair in the map.
3. Inside the loop, we extract the key and value from the pair
using pair.first
and pair.second
, respectively. We use the const
qualifier to ensure that the original map is not modified during iteration.
4. You can perform any desired operations or logic within the loop using the extracted key
and value
variables.
Note: This code snippet is applicable to C++17 and later versions. If you are using an older version of C++, you can replace auto
with the actual types of your key and value.