Construir un método que permita ordenar porfechas y de mayor a menor un vector de nele-mentos que contiene datos de contratos (n <= 50).Cada elemento del vector debe ser una estructuracon los campos día, mes, año y número de con-trato. Pueden existir diversos contratos con lamisma fecha, pero no números de contrato repe-tidos.

Design a class tictactoe that: holds the following information about the game: two-dimensional array (3 by 3), and winner. add additional variables as needed. includes the functions to perform the various operations on objects. for example, function to print the board, getting the move, checking if move is valid, determining if there is a winner after each move. add additional operations as needed. includes constructor(s). write the functions of the class, and write a program that uses the class. the program should declare an object of type tictactoe. the program will create the board and store it in the array. the program will allow two players to play the tic-tac-toe game. after every valid move update the array, check if there is a winner. if there is no winner and no tie, then print the board again to continue.