c++ x y in arrau 1d

To declare a 1D array in C++ with the variables x and y, you can follow these steps:

1. Start by specifying the data type of the array elements. For example, if x and y are both integers, you would use the "int" data type.

2. Next, provide the name of the array. Let's call it "arr".

3. After the array name, use square brackets to indicate the size of the array. In this case, if x and y represent the dimensions of the array, you would use "x * y" as the size.

Here is an example of how you can declare a 1D array in C++ with the variables x and y:

int arr[x * y];

Please note that the values of x and y should be known at compile-time for the array declaration to be valid. If the values are determined at runtime, you may need to use dynamic memory allocation instead.