Use yacc lex ical analysis and parsing write a simple compiler, mainly to complete the addition, subtraction and loops of real and integer data processing conditional statements, while statements, assignments, etc.

ast
...\examples
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...\........\.....\test_ast.exe
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...\........\.....\test_program.txt
...\........\.....\test_program1.txt
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...\........\examples.sdf
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...\........\examples.suo
...\........\ipch
...\........\....\test_ast-efbe5038
...\........\test_ast
...\........\........\Debug
...\........\........\.....\CL.read.1.tlog
...\........\........\.....\CL.write.1.tlog
...\........\........\.....\ast.obj
...\........\........\.....\ast_lex.obj
...\........\........\.....\ast_yacc.obj
...\........\........\.....\link-cvtres.read.1.tlog
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...\........\........\.....\test_ast.Build.CppClean.log
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...\........\........\.....\test_ast.lastbuildstate
...\........\........\.....\test_ast.log
...\........\........\.....\test_ast.write.1.tlog
...\........\........\.....\test_ast_manifest.rc
...\........\........\.....\vc100.idb
...\........\........\.....\vc100.pdb
...\........\........\ast.c
...\........\........\ast.h
...\........\........\ast_lex.c
...\........\........\ast_lex.l
...\........\........\ast_yacc.c
...\........\........\ast_yacc.output
...\........\........\ast_yacc.y
...\........\........\test_ast.vcxproj
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...\........\........\test_ast.vcxproj.filters
...\........\........\test_ast.vcxproj.user
...\........\........\test_program.txt
...\........\........\test_program3.txt
...\tools
...\.....\FlexLexer.h
...\.....\README.txt
...\.....\UNISTD_ERROR.readme
...\.....\data
...\.....\....\README
...\.....\....\bison.m4
...\.....\....\c++-skel.m4
...\.....\....\c++.m4
...\.....\....\c-like.m4
...\.....\....\c-skel.m4
...\.....\....\c.m4
...\.....\....\glr.c
...\.....\....\glr.cc
...\.....\....\java-skel.m4
...\.....\....\java.m4
...\.....\....\lalr1.cc
...\.....\....\lalr1.java
...\.....\....\local.mk
...\.....\....\location.cc
...\.....\....\m4sugar
...\.....\....\.......\foreach.m4
...\.....\....\.......\m4sugar.m4
...\.....\....\stack.hh
...\.....\....\variant.hh
...\.....\....\xslt
...\.....\....\....\bison.xsl
...\.....\....\....\xml2dot.xsl
...\.....\....\....\xml2text.xsl
...\.....\....\....\xml2xhtml.xsl
...\.....\....\yacc.c
...\.....\win_bison.exe
...\.....\win_flex.exe
...\.....\win_flex_bison-2.5.zip

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