In C$++,$ Write a function start$\_$day$()$ to determine whoch day of the week is the $1$st of a given month in a given year for any year and any month starting with $2000.$ The function should take as input parameters the year number and themonth number $($in a year$)$ and return as a result an integer from $1$ to $7,$where $1$ is a Monday, $2$ is a Tuesday, $3$ is a Wednesday, $4$ is a Thursday,$5$ is a Friday, $6$ is a Saturday and $7$ is a Sunday. Assume that the $1$st of January $2000$ was a Monday.

You may want to use the following variable in your program:

days$\_$in$\_$month$[]=\{31,28,31,30,31,30,31,31,30,31,30,31\}$;