DIY: String to Integer (atoi)

Problem statement

In this coding exercise, you are given a string. You have to convert this string to a 32-bit signed integer. The string may have a leading whitespace. The first non-whitespace character in the string may or may not be numeric.

• If it isn’t numeric, it may be a + or - sign, which will determine if the final result is negative or positive, respectively. You ...