Please write C$++$ programs for the following problems: Write a program that asks the user for a positive integer value and that uses a loop to validate the input. The program should then use a second loop to compute the sum of all the integers from $1$ up to the number entered. For example, if the user enters $20,$ the loop will find the sum of $1+2+3+4+5+6+7+8+9+17+18+19+20.$