Write a function kth_digit (n,k,result) which returns the kth digit from the right in agiven integer number n.

Question

the function should return the resulted value to the parameter result (call by reference).

Answer 1

Sounds like homework to me. Without knowing what computer language, I'm unable to provide an answer. In general there are many ways to solve this problem. One key point:: result should be passed by reference as a parameter to the function, and the answer should be saved to that parameter, rather than passing it back. This sounds like a void function return.

You also need some bounds checking (does n have at least as many digits as k?) If not that's a possible error.

You can either use modulus to do this, or convert n to a string. In c, strings are arrays of chars, so getting the kth, character in the array from the right would be the k-1.

Answer 2

You should write the code yourself.

There is a function is all modern languages to convert an item to a string. In C# it would be newstring=Item.ToString(); probably the same in a few other languages to. Then all you need to do is get the length of the string and return the character at position length-k.