(C ++ ) (using loop, without using void command)

Write a program that asks the user for a positive integer value by prompting "Enter a positive integer number: ", read in that number, then use a loop to get the sum of all the integers from 1 up to the number entered. For example, if the user enters 50, the loop will find the sum of 1, 2,3, 450. It should print "The total of all the integers from 1 to 50 is "

Input validation: when user enters a invalid number, the program should prompt user "The number cannot be less than one."