In C++

E5.16 Write a function that computes the weekday of a given date, using a formula known as Zellers congruence. Let d the day of the month mm the modified month (3 March, .., 12-December, 13January, 14 -February) w the weekday (O Monday, 1 Tuesday,6Sunday Then ( 26x (mn + 1)) , 5 x(year % 100) , 21x (year/100) )%2 w-d+5+ 10 Here, all / denote integer division and % denotes the remainder operation