Please only use SML / ML code. Do not copy the codes on chegg, they're wrong. Write a function int2str to convert an integer to a string int2str(1234) → "1234", int2str(~1234) → "~1234" Write a function str2int to convert a string to an integer (assume that the number is always valid) str2int("1234") → 1234, str2int("~1234") → ~1234 Write a function pairStar to form a new string where identical chars that are adjacent in the original string are separated from each other by a "*" pairStar("xxyy") → "x*xy*y", pairStar("aaaa") → "a*a*a*a"

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Please only use SML / ML code. Do not copy the codes on chegg, they're wrong.

  1. Write a function int2str to convert an integer to a string
    int2str(1234) → "1234", int2str(~1234) → "~1234"
  2. Write a function str2int to convert a string to an integer (assume that the number is always valid)
    str2int("1234") → 1234, str2int("~1234") → ~1234
  3. Write a function pairStar to form a new string where identical chars that
    are adjacent in the original string are separated from each other by a "*"
    pairStar("xxyy") → "x*xy*y", pairStar("aaaa") → "a*a*a*a"
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