一个简单的C语言编译器

一个简单的C语言编译器(22)   out<<"\tmov ah,02h"<<endl;
  out<<"\tint 21h"<<endl;
  out<<"\tret"<<endl;
  out<<"outint\tendp"<<endl;
  out<<endl;
 }
 out<<"main\tproc near"<<endl;
 out<<"\t;***CODE START***"<<endl;
 log<<"开始优化代码."<<endl;
 optimize();
 log<<"优化代码完毕."<<endl;
 out<<code;
 log<<"写入目标代码."<<endl;
 out<<"\t;***CODE END***"<<endl;
 out<<"\tret"<<endl;
 out<<"main endp"<<endl;
 out<<endl;
 out<<"start:"<<endl;
 out<<"\tmov ax,@data"<<endl;
 out<<"\tmov ds,ax"<<endl;
 out<<"\tcall main"<<endl;
 out<<"\tlea dx,__end"<<endl;
 out<<"\tmov ah,09h"<<endl;
 out<<"\tint 21h"<<endl;
 out<<"\tmov ah,08h"<<endl;
 out<<"\tint 21h"<<endl;
 out<<"\tmov ah,4ch"<<endl;
 out<<"\tint 21h"<<endl;
 out<<"\tend start"<<endl;
 out.close();
 log<<endl;
 log<<"代码生成完成!"<<endl;
 log<<"*******************************************"<<endl;
 }

 else
 {
  log<<endl;
  log<<"无法创建文件!"<<endl;
  log<<"*******************************************"<<endl;

 }
// Label *q;//测试Label
// for(int i=0;i<10;i++){
//   q=new Label;
//   log<<q->text.c_str()<<endl;
//  delete q;
// }
 return;
}

Compiler::err(int no,int line)
{
 string errText;
 hasError=1;
 switch(no){
 case 1: