Chapter 9 Enumeration Types

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Chapter 9 Enumeration Types

• By C. Shing
• ITEC Dept
• Radford University

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Objectives

• Understand how to use enumerate data type

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Enumeration Type

• List all member in a set
• Help internal documentation
• Declare data type enum enumerate_name
• Form enum enumerate_name
• member1n1, , memberN
• Default n10, and increment by 1 for
• the next member

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Enumeration Type (Cont.)

• Example
• enum computer
• supers, mains, minis, micro, pda
• typedef enum computer computer
• computer c, d
• cmains
• d find_next_member (c)
• printcomputer(d)
• computer find_next_member (computer c)
• return (computer) (((int) c 1)5)

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Enumeration Type (Cont.)

• Example
• void printcomputer (computer c)
• switch (c)
• case supers printf(Supercomputer\n break
• case mains printf(Main Frame\n break
• case minis printf(Minicomputer\n break
• case micro printf(Microcomputer\n break
• case pda printf(Personal Digital
  Assistant\n break
• default printf(Error!\n) exit(1)

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Enumeration Type (Cont.)

• Example (Alternative)
• computer find_next_member (computer c)
• switch (c)
• case supers return mains break
• case mains return minis break
• case minis return micro break
• case micro return pda break
• case pda return supers break
• default printf(Error!\n) exit(1)

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References

• Deitel Deitel C How to Program, 4th ed.,
• Chapter 10, Prentice Hall