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Which function returns the map entry associated with 12.4?

```cpp
#include
#include
#include

using namespace std;

int main() {
map logIn;
logIn.emplace("emp1", 12.4);
logIn.emplace("Emp2", 10.5);
logIn.emplace("eMp2", 1.30);
logIn.emplace("12.4", 12.4);

// XXX
cout << logIn.count("12.4");

return 0;
}
```

A. `logIn.emplace("12.4")`
B. `logIn.clear("12.4")`
C. `logIn.at("12.4")`
D. `logIn.count("12.4")`

Answer :

To retrieve the map entry associated with the key "12.4" in the given code, the correct function to use is `logIn.at("12.4")`.

Which function can be used to retrieve the map?

The given code initializes a `map` called `logIn` and inserts key-value pairs using `emplace()`.

To retrieve the map entry associated with the key "12.4", you need to use the appropriate function.

By calling `logIn.at("12.4")`, you can access the value associated with the key "12.4".

This function throws an exception if the key is not found in the map.

Alternatively, `logIn.count("12.4")` can be used to check the number of occurrences of the key in the map (in this case, it will return 1).

Learn more about map entry

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