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Blue Forest http://www.lslnet.com at 10:18 on June 6, 2006
 Question
Definition :
A. . Variable : Begin with character set [ 'a' - 'z' and '̲'] variable can
Contain char set [ 'a' - 'z' and '̲,' '0' - '9']. Sensitive Case.
B. . Constant : Only contain the char set [ '0' - '9'], and range is 0 to
2147483647.
C. . Assignment Expression :
A. . Assign to variable constant
For example :
A1 = 1;
O Assign variable to variable
For example :
A1 = 1;
A2 = 2;
A1 = A2
A. . Assignment mark : '='
B. . Assignment separator : '; '
A. . Error (optional implementation is the point marked by *)
A. . Number format error
For example :
A1 = 1a12;
A. . Variable format error
For example :
1A1 = HUST
A. . Assignment expression format error
For example :
A1 ====== 1a12;
A1 = A2 = 1a12;
A. . * Assignment separator expected
For example :
A1 = 112
A. . *Variable Expected
For example :
= 112;
A. . *Constant Expected
For example :
A1 =;
A. . Assign error
A. . No initial value
For example :
A1 = 1;
A2 = A3
A. . Modify Constant
For example :
1 = A1;
Input :
A text file contains a set of assignment expressions.
For example :
A1 = 1;
A2 = 2;
A3 = 3;
Rated A2 =
A1 = 3;
Output
List all the variables that have the same value and the list goes on with
Their value together.
For example :
After process of the above expressions, you need output
The result like this :
[A1, A2, A3] = 3;
Requirement :
A. . Design document (English only) is required. This document should write
Before you write any code.
B. . Code should be consistent with java code convention.
C. . Program can identify and handle all the errors in definition part.
Test point :
A. . Correctness
A. . Identify all error in expression
B. . Treat expressions correctly
C. . Output correct result
A. . Reliability
A. . Processing can not be interrupted by incorrect input or other reason
B. . Heap will not overflow when big amount of expressions are processed
A. . Performance
A. . Amount of the expressions can be treated in one second
A. . Memory
A. . Memory occupied when 100,000 correct expressions are treated. |
Question
His top, you help out! |
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