Change the program addemup.c which found the sum of the first 20 integers.write a program that calculates how much money you get in 20 days if you recieve $1 the firts day,$2 the second day,$3 the third day,and so on. Modify the program so that you can tell it interactively how far the calculations should proceed. That is, replace the 20 with a variable that is read in.