import?java.util.Scanner;
public?class?test?{
static?Byte[]?prog?=?new?Byte[80];
static?Byte[]?token?=?new?Byte[8];
static?Byte?ch;
static?int?p?=?0;
static?int?syn;
static?int?m;
static?int?n;
//int?sum;
public?static?void?main(String[]?args)
{
System.out.println("請輸入您的程序："); Scanner?in?=?new?Scanner(System.in); do?{ ch?=?in.nextByte(); prog[p++]?=?ch; }?while(ch?!=?'$'); p?=?0; System.out.println("詞法分析的結果是:"); scanner(); while?(syn?!=?0) { switch(syn) { case?-1: System.out.println("單詞有誤!");? break; default: System.out.println(String.format("(%d,%s)",?syn,?token)); } scanner(); }//?return?0;
}
public?static?int?scanner()
{
for(n?=?0;?n?<?8;?n++)?
token[n]?=?null;
ch?=?prog[p++];
m?=?0;
while?(ch?==?'?')
ch?=?prog[p++];
if?(ch?==?'d')
{
token[m++]?=?ch;
token[m++]?=?'\0';
syn=3;
}
else?if?(ch?==?'a')
{?
token[m++]?=?ch;
ch?=?prog[p++];
switch(ch)
{
case?'b':
token[m++]?=?ch;
syn?=?1;
break;
case?'c':
token[m++]?=?ch;
syn?=?2;
break;
default:
syn?=?-1;
}
}?else?if?(ch?==?'$')?
syn?=?0;
else?syn?=?-1;return?0;
}
}