A C$++$ class named "staff" is going to be created. Check the UML diagram given below and read follow the instructions and write the code accordingly.staffsNo:int sName: string salary: doublestaff$()//$appropriate default values should be assigned to each data memberstaff$($int$,$string, double$)$staff$($const staff&$)$~staff$()$getsNo$()$: intgetsName$()$: string getsalary $)$:doublesetsNo $($ int$)$: void setsName string$)$ : void setsalary $($double$)$: voidannualSalary $)$:double $//$Calculates the annual salary $($salary$*12)$ and returns printStaffinfo$)$: void