編譯器器器器器
This a final semester project of the course, Compiler.
This project use：
-
gcc version 4.6.1
-
flex version 2.5.4
-
bison(GNU bison) version 2.4.1
Simple installation tutorial(you can expand this tag)📖
For gcc, you can install wxDev-C++ version 7.4.2 to get this gcc from this:
In website, choose the tab, "download"
In the tab page, "download", choose the download option, "wxDev-C++ Full Installer" to download.
Note that the installation could not including space.
After the installation completed, you need to set the environment variable.
In System Variable, choose the Path option and insert Your installation location.
At last, you need to run wxDevC++ to get the linking library. (they will show up in the following steps)
First of all, wxDevC++ will ask you to set the First-Run Configuration, Choose the language you are using.
Second, tick the "Yes, I want to use this feature".
Other configuration can keep the default.
For Flex, you can install from this：
In website, choose the download option, "Complete package, except sources" to download.
Note that the installation could not including space
For Bison, you can install from this：
In website, choose the download option, "Complete package, except sources" to download.
The installation location should be identical to Flex's.
Note that the installation could not installation space
After the installation completed, you need to set the environment variable.
In System Variable, choose the Path option and insert Your installation location.
Copy Linking Library
The linking library will show up after you complete First-Run Configuration of wxDev-C++.
Copy the 3 files of the directory "lib" that under the Flex's and Bison's root location.
Paste in the directory MinGW32\lib that under the wxDev-C++'s root location.
Testing installation results
type the script as followed
(Note that v is case-sensitive)
gcc -v
The version should be 4.6.1
The COLLECT_LTO_WRAPPER location should under the directory of wxDev-C++'s location.
(If not, may be the wrong version of gcc being caught)
flex -V
The version should be 2.5.4
bison -V
The version should be 2.4.1
A "calculator" implemented with the Lex and Bison(Yacc's GNU version).
This calculator including Arithmetic Expression which can have operations Such like：
- Addition
- Subtraction
- Multiplication
- Division
Also support：
- Modulus
- Round brackets
Basic Mathematical Functions
+
-
*
/
%
Constant
pi：3.1415926
Trigonometric functions：
sin()
cos()
tan()
Floor and ceiling functions
ceil() = uGuass
uGuass() = ceil()
floor() = lGuass()
lGuass() = floor()
Other Mathematical Functions
abs()：Absolute value.
sqrt()：Square root.
log()：The logarithm of X to base 10.
ln()：The logarithm of X to base 2.
exp()：Natural logarithm.
flex calculator_trail.l
It should produces lex.yy.c
bison -d Calculator.y
It should produces Calculator.tab.h and Calculator.tab.c
gcc -o Calculator Calculator.tab.c lex.yy.c -lfl
It should produces Calculator.exe
./Calculator.exe
It starts to run the calculator.
You can type any Arithmetic expression on terminal.
We create a windows batch file to simply the process of compiling and executing.
compile_and_run.bat Calculator
It should produces Calculator.tab.h, Calculator.tab.c, lex.yy.c and Calculator.exe.
Next it starts to run the calculator.
You can type any Arithmetic expression on terminal.
(You can use Pure_input.txt to enter into Terminal to see the results and you can see the details of Pure_input from DEMO_input.txt)
Here are examples that will cause error.
When an error occurred, the calculator will be terminated.
Empty characters also provoke an error.
flex Calculator.l
bison -d Calculator.y
gcc Calculator.tab.c lex.yy.c -lfl
./Calculator.exe
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