Sum practice for pointers

Question

Use the pointers p1, p2, and p3 and complete the following program to read two integers and display the sum of the integers between them. For example, if the user enters 6 and 10, the program should display 24 (7+8+9). The program should force the user to enter numbers less than 100 (<100) or greater than 0 (>0) and the first integer should be less than the second, else display "Invalid value".

Sample Input 1:

6 10

Sample Output 1:

24

Sample Input 2:

10 6

Sample Output 2:

Invalid value
 

References: C From Theory