Knuth-Morris-Pratt algoritmus (KMP) Farkas Attila FAANABI.ELTE.

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Knuth-Morris-Pratt algoritmus (KMP) Farkas Attila FAANABI.ELTE

Knuth-Morris-Pratt algoritmus (KMP) BLABLABLABLALAKBAN BLABLALAK

Next[]

Knuth-Morris-Pratt algoritmus (KMP) BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

BLABLABLABLALAKBAN BLABLALAK

C++ Implementáció

C++ implementáció teszt környezettel #include using namespace std; string S="blablablablalakban"; string M="blablalak"; int next[100]; int n=S.length(); int m=M.length(); bool u=false; int k=0; void initnext(){ int i,j; i=1; j=0; next[0]=0; while(i<m-1){ if(M[i]==M[j]){ i++; j++; next[i]=j; }else{ if(j==0){ i++; next[i]=0; }else{ j=next[j]; } // tomb indexeles javitasa -1 iranyba int tmp[100]; for(int i=0;i<99;i++){ tmp[i]=next[i+1]; } for(int i=0;i<99;i++){ next[i]=tmp[i]; } void KMP(){ initnext(); int i,j; i=0; j=0; while(i<n && j<m){ if(S[i]==M[j]){ i++; j++; }else{ if(j==0){ // a minta elejer ugrunk i++; }else{ j=next[j]; } if(j==m){ k=i-m; u=true; }else{ u=false; } int main(){ cout << S << endl; cout << M << endl; initnext(); cout << " " << endl; for(int i=0;i<m-1;i++){ cout << next[i] ; } cout << endl; KMP(); cout << "Megtalalhato?(0=nem;1=igaz)" << u << endl; return 0; }

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