Create a function to convert a string of decimal digit characters ('0' to '9') to an integer. Print the starting string and the resulting integer. (A leading sign + or - may be included in the string.)
Repeat Project #1 except convert a string containing hex digits. (for example: 0xa43ff)
Repeat Project #1 except convert a string containing scientific notation. (for example: -3.54e-6)
Project #4: Draw a state diagram for floats. (Float example: 3.14159)