QBASIC编译器，用yacc、lex等生成，生成语法树（AST），自动代码生成，静态链接运行库-llvm-qbc is a QBASIC compiler as well as an runtime library ( statically linked ).Based on yacc,

利用lex词法分析和yacc语法分析编写的简单编译器，主要完成实数和整型数据的加减乘除以及循环语句，条件语句，while语句，赋值语句等的处理-Use yacc lex lexical analysis and parsing write a simple compiler, mainly to complete the addition, subtraction and loops of real and integer data processing conditional statemen

Converts gcc fdump tree into drawn code