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Variables and constants Applications of Computer Programming in Earth Sciences Instructor: Dr. Cheng-Chien LiuCheng-Chien Liu Department of Earth Sciences National Cheng Kung University Last updated: 5 October 2004 Chapter 3
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Variable and memory Binary Byte Bit RAM sizeof Ex3-1
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Variable types Table 3.1 char int float double Adjective signed unsigned short long Naming Hungarian + Camel-notation Case sensitive
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Declare and initialize Declare before use Two ways of initialization Always initialize a variable and ask what would its value be later on Ex3-2 typedef Ex3-3 Wrapping around an unsigned integer Ex3-4 Wrapping around an signed integer Ex3-5
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Characters Character number ASCII Ex3-6 Special printing characters Table 3.2
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Constants Two types Literal constant Symbolic constant Two ways of defining a constant #define const Enumerated constant enum Started from 0, 1, 2, … Ex3-7
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