make a program to calculate bills of users catagories gold , silver & copper:gold caller have to pay (w+x+y+z)*1000 and
silver users have to pay (w+x+y+z)*500 for first 200 calls and Rs. 1 for each additional calls and
copper user have to pay Rs. 5 for each call? where w, x,y,z are any intergers.
c++ mein bunana hai by using condtional statment