词法分析程序(原创！)
来源：互联网 发布：淘宝管控记录异常订单 编辑：程序博客网 时间：2024/04/30 10:11
/************************************************************************
词法分析程序
功能：用于对输入的字符串进行分类（如果是无符号数，就对它记值；否则值为空）
类别码：1-无符号数,2-‘+’,3-‘-’,4-‘*’,5-‘/’,6-‘(’,7-‘)’
***************************************************************************/
#include<iostream.h>
#include <windows.h>
#include <conio.h>
/*清屏函数定义*/
int clrscr()
{
HANDLE hndl = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO csbi;
GetConsoleScreenBufferInfo(hndl, &csbi);
DWORD written;
DWORD N = csbi.dwSize.X * csbi.dwCursorPosition.Y +
csbi.dwCursorPosition.X + 1;
COORD curhome = {0,0};
FillConsoleOutputCharacter(hndl, ' ', N, curhome, &written);
csbi.srWindow.Bottom -= csbi.srWindow.Top;
csbi.srWindow.Top = 0;
SetConsoleWindowInfo(hndl, TRUE, &csbi.srWindow);
SetConsoleCursorPosition(hndl, curhome);
return 0;
}
void main(){
char input[20]; //定义输入缓冲区
char s,CurrentState; //定义s用于接收判断是否继续，CurrentState判断当前状态
unsigned int i,oldi,j; //定义临时变量，用于数组操作
do{
cout<<"/t ---------------------------/n";
cout<<"/t| 词法分析程序 |/n";
cout<<"/t ---------------------------/n";
cout<<"/t请输入：/n";
cout<<"/t ";
cin>>input; //屏幕提示输入
i=0,oldi=0,CurrentState='0';
cout<<"/tclassno/t/tvalue/n";//输出列属性
do{
switch(CurrentState){ //判断当前状态
case '0':
switch(input[i]){ //判断输入数值
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';//改变状态，指向下一个字符
i++;
break;
case '.': CurrentState='3';
i++;
break;
case '+': if(i-oldi>0){ //判断如果符号前有数字，就输出
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){ //判断如果符号前有数字，就输出
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{ //非法字符判断
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '1':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';
i++;
break;
case 'E': CurrentState='4';
i++;
break;
case '.': CurrentState='2';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0') //1、2、6状态可以是终态
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '2':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';
i++;
break;
case 'E': CurrentState='4';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '3':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='2';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0') //3、4、5不能是终态
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '4':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6'; i++;break;
case '+': CurrentState='5'; i++;break;
case '-': CurrentState='5'; i++;break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '5':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '6':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
}
}while(1);
exit: cout<<"/n/t请输入e推出 任意键继续/n";
cout<<"/t";
cin>>s;
if(s!='e')
clrscr();
}while(s!='e');
}
词法分析程序
功能：用于对输入的字符串进行分类（如果是无符号数，就对它记值；否则值为空）
类别码：1-无符号数,2-‘+’,3-‘-’,4-‘*’,5-‘/’,6-‘(’,7-‘)’
***************************************************************************/
#include<iostream.h>
#include <windows.h>
#include <conio.h>
/*清屏函数定义*/
int clrscr()
{
HANDLE hndl = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO csbi;
GetConsoleScreenBufferInfo(hndl, &csbi);
DWORD written;
DWORD N = csbi.dwSize.X * csbi.dwCursorPosition.Y +
csbi.dwCursorPosition.X + 1;
COORD curhome = {0,0};
FillConsoleOutputCharacter(hndl, ' ', N, curhome, &written);
csbi.srWindow.Bottom -= csbi.srWindow.Top;
csbi.srWindow.Top = 0;
SetConsoleWindowInfo(hndl, TRUE, &csbi.srWindow);
SetConsoleCursorPosition(hndl, curhome);
return 0;
}
void main(){
char input[20]; //定义输入缓冲区
char s,CurrentState; //定义s用于接收判断是否继续，CurrentState判断当前状态
unsigned int i,oldi,j; //定义临时变量，用于数组操作
do{
cout<<"/t ---------------------------/n";
cout<<"/t| 词法分析程序 |/n";
cout<<"/t ---------------------------/n";
cout<<"/t请输入：/n";
cout<<"/t ";
cin>>input; //屏幕提示输入
i=0,oldi=0,CurrentState='0';
cout<<"/tclassno/t/tvalue/n";//输出列属性
do{
switch(CurrentState){ //判断当前状态
case '0':
switch(input[i]){ //判断输入数值
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';//改变状态，指向下一个字符
i++;
break;
case '.': CurrentState='3';
i++;
break;
case '+': if(i-oldi>0){ //判断如果符号前有数字，就输出
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){ //判断如果符号前有数字，就输出
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{ //非法字符判断
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '1':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';
i++;
break;
case 'E': CurrentState='4';
i++;
break;
case '.': CurrentState='2';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0') //1、2、6状态可以是终态
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '2':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='1';
i++;
break;
case 'E': CurrentState='4';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '3':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='2';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0') //3、4、5不能是终态
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}
break;
case '4':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6'; i++;break;
case '+': CurrentState='5'; i++;break;
case '-': CurrentState='5'; i++;break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '5':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
case '6':
switch(input[i]){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': CurrentState='6';
i++;
break;
case '+': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<2<<endl;
CurrentState='0';
oldi=++i; break;
case '-': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<3<<endl;
CurrentState='0';
oldi=++i; break;
case '*': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<4<<endl;
CurrentState='0';
oldi=++i; break;
case '/': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<5<<endl;
CurrentState='0';
oldi=++i; break;
case '(': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<6<<endl;
CurrentState='0';
oldi=++i; break;
case ')': if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<"/t"<<7<<endl;
CurrentState='0';
oldi=++i; break;
default: if(input[i]=='/0')
{
if(i-oldi>0){
cout<<"/t"<<1<<"/t/t";
for(j=oldi;j<i;j++)
cout<<input[j];
cout<<endl;}
cout<<endl<<"/t Finished!"<<endl;
goto exit;
}else{
cout<<"/t ERROR!"<<endl; goto exit;
} break;
}break;
}
}while(1);
exit: cout<<"/n/t请输入e推出 任意键继续/n";
cout<<"/t";
cin>>s;
if(s!='e')
clrscr();
}while(s!='e');
}
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