Write a program to compute the sum of two positive integer numbers. Each number is up to 20 digits. Do not use any REAL or LONGINT types in the program.
Must use stacks, digits must be read in one-by-one. For example 2345678 + 9999999999, must be read in 2, then 3, then 4, and so on. if sum of two digits is greater than 9, u must carry it over, so the next part can use it.