main.cpp

编译原理实验：设计并实现一个Simple语言的编译器

/************************************************************************/
/* 文件名：main.cpp														*/
/* 功  能：主函数													   */
/* 创建时间：2008-1-7													*/
/* 最后修改时间：2008-1-11				                                */
/************************************************************************/
#include "lexer.h"
#include "parser.h"
#include "execute.h"
using namespace std;

//-----------------------------欢迎信息-----------------------------------//
void welcom()
{
	cout<<"________________欢迎使用simple语言编译器_________________"<<endl;
	cout<<"______________________________________________________________________"<<endl;
}

//-----------------------------查看符号表内容-----------------------------//
void looksingtable()
{
	ifstream fin("lexer.txt");
	if (!fin)
	{
		cout<<"抱歉，打开文件lexer.txt失败！请检查后重试。"<<endl;
		exit(-1);
	}
	cout<<"种别码\t类型码"<<endl;
	int type, value;
	char temp;
	while (!fin.eof())
	{
		fin>>type>>temp>>value;
		cout<<type<<"\t"<<value<<endl;
	}
	fin.close();
}

//--------------------查看四元式内容----------------------//
void lookfourth()
{
	cout<<"行号\t运算符\t参数1\t参数2\t结果"<<endl;
	for (int i=0; i<codetab; i++)
	{
		cout<<i<<"\t"<<code[i].op<<"\t"<<code[i].ag1<<"\t"<<code[i].ag2<<"\t"<<code[i].result<<endl;
	}
}

//------------------------------------主函数-----------------------------//
int main()
{
	string choose;
	welcom();
    if (lexmain() == 1)//词法分析
		exit(-1);
	cout<<"______________________________________________________________________"<<endl;
	while (1)
	{
		cout<<"已完成词法分析,现在你可以:1.查看符号表内容 | 2.继续语法分析"<<endl;
		cout<<"请选择：";
		cin>>choose;
		if (choose == "1")
		{
			looksingtable();//查看内容
			cout<<"______________________________________________________________________"<<endl;
		}
		else
			break;
	}
	cout<<"______________________________________________________________________"<<endl;
	cout<<"正在进行语法分析......"<<endl;
	if (parsermain() == 1)//语法与语义分析
			exit(-1);
	cout<<"______________________________________________________________________"<<endl;
	while (1)
	{
		cout<<"已完成语法分析,现在你可以:1.查看生成的四元式 | 2.查看生成的符号表内容 | 3.继续解释执行程序"<<endl;
		cout<<"请选择：";
		cin>>choose;
		if (choose == "1")
		{
			lookfourth();//查看生成的四元式
			cout<<"______________________________________________________________________"<<endl;
		}
		else if (choose == "2")
		{
			looksingtable();//查看内容
			cout<<"______________________________________________________________________"<<endl;
		}
		else
			break;
	}
	cout<<"______________________________________________________________________"<<endl;
	execute();//解释执行
	cout<<"成功解释执行!"<<endl;
	cout<<"______________________________________________________________________"<<endl;
    return 0;
}