Respuesta :
The expression whose value is true if the elements of the diagonal that includes the first element of the first row are all equal is -
tictactoe[0][0] == tictactoe[1][0] && tictactoe[1][0] == tictactoe[2][0]
What is an array?
An array is a data structure of elements similar in nature that are stored in adjacent memory locations and may be accessed individually via an index toward a unique identifier.
An array of five int values can be declared without having to declare five distinct variables (each with its own identifier).
According to the question;
In the following cases, there is a two-dimensional or matrix array with int data type 'tictactoe' with a total of nine elements, and we must specify the diagonal of a array variable that constitutes the very first member of the first row is equal.
According to the scenario, the next expressions are correct;
tictactoe[0][0] == tictactoe[1][0] && tictactoe[1][0] == tictactoe[2][0]
To know more about the array, here
https://brainly.com/question/24275089
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The complete question is-
A 2-dimensional 3x3 array of ints, has been created and assigned to tictactoe. Write an expression whose value is true if the elements of the diagonal that includes the first element of the first row are all equal.