Data Structure _ string_string_kmp algorithm _ C ++ implementation

"Head. h"

 

 

View plaincopy to clipboardprint? # Include <iostream>
# Include <string>
Using namespace std;
 
Class STRING
{
Public:
Void GetString ();
Void GetSubString ();
Void KMP ();
Void Print ();
Private:
Void GetNext ();
String str;
String sub;
Int next [1000];
Int strlen;
Int sublen;
};
 
Void STRING: GetString ()
{
Cout <"Please Input The MainString:" <endl;
Cin> str;
Strlen = str. length ();
}
 
Void STRING: GetSubString ()
{
Cout <"Please Input The SubString:" <endl;
Cin> sub;
Sublen = sub. length ();
}
 
Void STRING: KMP ()
{
Cout <"KMP Method Called! "<Endl;
GetNext ();
Int I, j;
I = j = 0;
While (I <strlen & j <sublen)
{
If (j =-1 | str [I] = sub [j])
{
I ++;
J ++;
}
Else
{
J = next [j];
}
}
If (j = sublen)
{
Cout <"Succeed! Position = "<I-j + 1 <endl;
}
Else
{
Cout <"Failed! "<Endl;
}
}
 
Void STRING: Print ()
{
Cout <"Main String =" <str <endl <"Length =" <strlen <endl;
Cout <"SubString =" <sub <endl <"Length =" <sublen <endl;
}
 
Void STRING: GetNext ()
{
Int I, j;
Next [0] =-1;
I = 0; j =-1;
While (I <sublen-1)
{
If (j =-1 | sub [I] = sub [j])
{
I ++;
J ++;
If (sub [I]! = Sub [j])
Next [I] = j;
Else
Next [I] = next [j];
}
Else
{
J = next [j];
 
}
}
}
# Include <iostream>
# Include <string>
Using namespace std;

Class STRING
{
Public:
Void GetString ();
Void GetSubString ();
Void KMP ();
Void Print ();
Private:
Void GetNext ();
String str;
String sub;
Int next [1000];
Int strlen;
Int sublen;
};

Void STRING: GetString ()
{
Cout <"Please Input The MainString:" <endl;
Cin> str;
Strlen = str. length ();
}

Void STRING: GetSubString ()
{
Cout <"Please Input The SubString:" <endl;
Cin> sub;
Sublen = sub. length ();
}

Void STRING: KMP ()
{
Cout <"KMP Method Called! "<Endl;
GetNext ();
Int I, j;
I = j = 0;
While (I <strlen & j <sublen)
{
If (j =-1 | str [I] = sub [j])
{
I ++;
J ++;
}
Else
{
J = next [j];
}
}
If (j = sublen)
{
Cout <"Succeed! Position = "<I-j + 1 <endl;
}
Else
{
Cout <"Failed! "<Endl;
}
}

Void STRING: Print ()
{
Cout <"Main String =" <str <endl <"Length =" <strlen <endl;
Cout <"SubString =" <sub <endl <"Length =" <sublen <endl;
}

Void STRING: GetNext ()
{
Int I, j;
Next [0] =-1;
I = 0; j =-1;
While (I <sublen-1)
{
If (j =-1 | sub [I] = sub [j])
{
I ++;
J ++;
If (sub [I]! = Sub [j])
Next [I] = j;
Else
Next [I] = next [j];
}
Else
{
J = next [j];

}
}
}

 

 

"Main. cpp"

 

 

 

View plaincopy to clipboardprint? # Include <iostream>
# Include "head. h"
Using namespace std;
 
Int main ()
{
STRING str;
Char choice;
While (1)
{
Cout <"Your Choice Please? "<Endl
<"1. Set Main String" <endl
<"2. Set SubString" <endl
<"3. KMP" <endl
<"4. Print" <endl
<"5. Quit" <endl;
Cin> choice;
Switch (choice)
{
Case '1 ':
Str. GetString ();
Break;
Case '2 ':
Str. GetSubString ();
Break;
Case '3 ':
Str. KMP ();
Break;
Case '4 ':
Str. Print ();
Break;
Case '5 ':
Return 0;
Default:
Cout <"No Such Choice! "<Endl;
Break;
}
}
}

Author: "Dreamer Thinker Doer"