start.cpp

用C语言实现的PL0的源代码

// PL0 Compiler
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <iostream>
#include "pl0.h"

void main(int argc,char *argv[])
{
	char name;
	char filename[256];
	printf("    2004级编译原理大作业!\n");
	printf("---------------------------------------------------------------\n");
	printf("writen by 刘华明 34211219, 2007-5-3\n");
	printf("---------------------------------------------------------------\n");
	if (argc!=2)
	{
		printf("source file:");
		gets(filename);
	}
	else
		strcpy(filename,argv[1]);

	CPlCompiler pl(filename);
	char ch;

	if (pl.FileEmpty())
	{
		printf("source file cannot be opened!\n");
		return;
	}

	printf("---------------------------------------------------------------\n");
	printf("list source file?(y/n): ");
	ch=getch();
	while (ch!='y'&&ch!='n') ch=getch();
	printf("%c\n",ch);
	if (ch=='y') pl.DisplaySrcfile();

	printf("---------------------------------------------------------------\n");
	printf("compiling...\n\n");
	pl.Compile();
	if (pl.ErrorNumber())
	{
		pl.DisplayErrors();
		printf("continue?(y/n): ");
		ch=getch();
		while (ch!='y'&&ch!='n') ch=getch();
		printf("%c\n",ch);
		if (ch=='n') return;
	}

	printf("---------------------------------------------------------------\n");
	printf("list object code?(y/n): ");
	ch=getch();
	while (ch!='y'&&ch!='n') ch=getch();
	printf("%c\n",ch);
	if (ch=='y') pl.ListCode();
	printf("---------------------------------------------------------------\n");
	printf("start\n");
	pl.Interpret();
	printf("---------------------------------------------------------------\n");
	printf("请输入任意字符，按回车结束！\n");
    scanf("%c\n",&name);
}