Please help in C++

Write a function named "safe_at" that takes an int and a string (or a string and an int) and returns a char. The char should be the character at int's position in the string. If the position is outside of the string, it should return a space character (' '). There are no visible test cases for this problem, so you should write your own tests for all potential edge cases. Trecommend using the "Student Testcase" tab. But you are welcome to compile and test it locally as well