Exercise $4($add two numbers represented as reversed strings$)$

Write a function that accepts two character arrays representing digits of two unsigned integer with their digits stored in the reversed order, and returns the integer value representing the sum of these two integers. For example, the function addReversedInt when called on the array char a$[]=\{\text{'}3\text{'},\text{'}2\text{'},\text{'}1\text{'}\}$ and char b$[]=\{\text{'}6\text{'},\text{'}5\text{'},\text{'}4\text{'}\}$ would return integer value $579.$ Parameters n and m hold the number of digits stored in arrays a$[]$ and b$[]$ respectively. Use the function form Exercise $3$ to performs string to integer conversions.