High School

Which assigns the vector's first element with 99?

```cpp
vector myVector(4);
```

A. `myVector.at(0) = 99;`
B. `myVector.at(-1) = 99;`
C. `myVector.at() = 99;`
D. `myVector.at(1) = 99;`

Answer :

Final answer:

The correct option to assign the vector's first element with 99 is option A. myVector.at() = 99;

Explanation:

The correct option to assign the vector's first element with 99 is option A. myVector.at() = 99;

The at() function is used to access or modify elements at a specific position in the vector. In option A, myVector.at() is used to access the first element of the vector, and then it is assigned the value 99 using the assignment operator (=).

Here's an example:

vector myVector(4);myVector.at(0) = 99;

This code assigns the first element of the vector myVector with the value 99.

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