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09.03.01
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:
1. :
2. :
N → aB
B → aB|bB| ε
3. , :
| a | b | |
| N | B | E |
| B | B | B |
| E | E | E |
2.
, .
.
.
.
1. :
tCond .
2. :
EOL .
3. :
ch ;
i () ;
alpha ;
ond tCond ;
Alph ;
Jump tCond .
C
#include <stdio.h>
#include <string.h>
// :
#define EOL '\0'
// :
typedef enum {N=0, B=1, E=2} tCond;
int main ()
{
// :
char Alph[] = {'a', 'b'};
// :
tCond Jump[sizeof(tCond)][sizeof(Alph)/sizeof(char)] = {
{B, E},
{B, B},
{E, E}
};
// :
tCond cond;
// :
char alpha[128];
// :
char ch;
// :
int i = 0;
// :
cond = N;
// :
printf(" :\n> ");
gets(alpha);
alpha[strlen(alpha)] = EOL;
while ((ch = alpha[i++])!= EOL && cond!= E)
{
switch (ch) {
case 'a':
cond = Jump[cond][0];
break;
case 'b':
cond = Jump[cond][1];
break;
default:
cond = E;
}
}
if(cond == B)
printf("\n \n");
else
printf("\n \n");
return 0;
}
C#
using System;
using System.Collections.Generic;
using Automatic;
namespace Automatic
{
class FinitAutomat
{
// :
enum tCond {N = 0, B = 1, E = 2};
// , :
static public bool IdLanguage(string alpha)
{
// :
tCond cond = tCond.N;
// :
tCond[,] Jump = new tCond[,] {
{ tCond.B, tCond.E },
{ tCond.B, tCond.B },
{ tCond.E, tCond.E }
};
// :
char[] liters = new char[] { 'a', 'b' };
|
|
|
// :
List<char> Alph = new List<char>(liters);
/*
: */
for (int i = 0; i < alpha.Length && cond!= tCond.E; i++) {
if (Alph.Contains (alpha [i])) { /* -
: */
cond = Jump [(int)cond, Alph.IndexOf (alpha [i])];
} else { //... - :
cond = tCond.E;
}
}
if (cond == tCond.B) // - :
return true;
else //- :
return false;
}
}
}
class Program
{
static void Main()
{
Console.Write (" :\n> ");
if (FinitAutomat.IdLanguage (Console.ReadLine ()))
Console.WriteLine (" !");
else
Console.WriteLine (" !");
}
}
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8. :
1 ⊗ 2,
1 2 ;
⊗ (>, <, =, <>, >=, <=).
9. . 1 () 0 (). AND ( ) OR ( ).
2.
2.1
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2.3
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:
1. ;
2. ;
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: C.
1
2
, .
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, , . .
1. .
2. , , .
1. :
eol , .
2. :
ch ;
i () ;
S .
|
|
|
3. :
NextChar() ;
Pointer() ;
Name() ;
ResetConsole() ;
ResetFile() , , ;
Error() .
C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
char ch;
const char eol='\n';
char S[128];
int i;
void NextChar();
void Pointer();
void Name();
void ResetFile();
void ResetConsole();
void Error();
int main (int argc, char * const argv[])
{
ResetConsole();
Pointer();
if(ch == eol)
printf("\n !");
else
Error();
return 0;
}
void ResetConsole()
{
printf("\n \n> ");
gets(S);
i=0;
NextChar();
}
void NextChar()
{
if(i < strlen(S))
ch=S[i];
else
ch=eol;
i++;
}
void Pointer()
{
if(ch == '*')
{
NextChar();
Name();
}
else
Error();
}
void Error()
{
printf("\n !");
exit(0);
}
void Name()
{
if(isalpha(ch)!= 0)
{
while(ch!= eol)
{
if(isdigit(ch)!= 0 || isalpha(ch)!= 0)
NextChar();
else
Error();
}
}
else
Error();
}
using System;
using System.Collections.Generic;
using Automatic;
namespace Automatic
{
public class FinitAutomat
{
// :
enum tCond {N = 0, B = 1, E = 2};
/*
,
: */
static public bool IdLanguage(string alpha)
{
// :
tCond cond = tCond.N;
// :
tCond[,] Jump = new tCond[,] { { tCond.B, tCond.E }, { tCond.B, tCond.B }, { tCond.E, tCond.E } };
// :
char[] leters = new char[] { 'a', 'b' };
// :
List<char> Alph = new List<char>(leters);
// :
for (int i = 0; i < alpha.Length && cond!= tCond.E; i++) {
if (Alph.Contains (alpha [i])) { /* -
: */
cond = Jump [(int)cond, Alph.IndexOf (alpha [i])];
} else { //... - :
cond = tCond.E;
}
}
if (cond == tCond.B) // - :
return true;
else //- :
return false;
}
}
C#:
public class SintaxPointAnalizator
{
// :
string alpha;
// :
const char eol = '\0';
//:
int i;
// :
char ch;
//:
public SintaxPointAnalizator(string Alpha)
{
alpha = Alpha;
}
/* ,
: */
public bool PointLanguage()
{
i = 0;
NextChar ();
if (Pointer () && ch == eol)
return true;
else
return false;
}
// :
void NextChar()
{
if (i < alpha.Length)
ch = alpha [i];
else
ch = eol;
i++;
}
// :
bool Pointer()
{
if (ch == '*') {
NextChar ();
if (Name ())
return true;
else
return false;
} else
return false;
}
// :
bool Name()
{
if (char.IsLetter (ch)) {
while (ch!= eol) {
if (char.IsLetterOrDigit (ch))
NextChar ();
else
return false;
}
} else
return false;
return true;
}
}
}
|
|
|
class Program
{
static void Main()
{
Console.Write (" :\n> ");
string str = Console.ReadLine ();
if (FinitAutomat.IdLanguage (str))
Console.WriteLine (" - !");
else if ((new SintaxPointAnalizator (str)).PointLanguage ())
Console.WriteLine (" - !");
else
Console.WriteLine (" !");
}
}
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1. .
2. .
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9. ( ).
)
1. .. - : - 230100.62 . : , 2013. 52 .
2. .., .. . .: , 2011. 496 .
3. , .. Java: - : . : , 2011. 400 .
)
4. .. / .. . .: , 2007. 630 .
5. / .. . .: , 2010. 400 .
6. . : . / , .., , .., , .., , .. .: , 2010. 240 .
