Grafuri

parcurgere graf in latime bf

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Sa se parcurga un graf graf in latime (BF)     #include<fstream.h>#include<conio.h>struct nod{int inf;nod* adr;}; nod* l[20];int c[20],s[20],i,sf,n; void citire(char fisier[10],nod*l[20],int& n){nod* p;int i,j;fstream f(fisier,ios::in);f>>n;for(i=1;i<=n;i++) l[i]=0;while(f>>i>>j){p=new nod;p->adr=l[i];p->inf=j;l[i]=p;}f.close();} void bf(){nod* p;if(i<=sf){p=l[c[i]];while(p){if(s[p->inf]==0){sf++;c[sf]=p->inf;s[p->inf]=1;}p=p->adr;}i++;bf();}} void main(){citire(“graf.txt”,l,n);i=1;sf=1;c[i]=1;s[1]=1;bf();for(int i=1;i<=sf;i++) cout<<c[i]<<” “;cout<<endl;getch();} {joscommentenable}

graf hamiltonian

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Sa se verifice daca un graf este hamiltonian Fiind dat un graf neorientat memorat prin matricea de adiacenta sa se determine daca graful este Hamiltonian sau nu. Notiuni teoretice Definitie: Se numeste ciclu hamiltonian un ciclu elementar care trece prin toate varfurile grafului Definitie: Un graf care admite un ciclu hamiltonian se numeste graf hamiltonian … Read more

subgraf

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Subgraf Se citesc 2 grafuri neorientate, unul cu n noduri si m muchii, iar celalalt cu k varfuri si l muchii, ambele date prin vectorul muchiilor. Sa se determine daca al doilea graf este subgraf al primului. #include<fstream.h>fstream f(“date.in”,ios::in);fstream g(“date2.in”,ios::in); int a[100][100],b[100][100],n,m,k,l;void citire() {int x,y,i; f>>n>>m; for(i=1;i<=m;i++) {f>>x>>y; a[x][y]=1; a[y][z]=1; } g>>k>>l; for(i=1;i<=l;i++) {g>>x>>y; b[x][y]=1; … Read more

roy floyd-grafuri orientate

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#include<fstream.h>#include<conio.h>const float pinf=1.e20;float a[50][50];int n; void citire(char nume[20],float a[50][50],int& n){int i,j;float c;fstream f(nume,ios::in);f>>n;for(i=1;i<=n;i++) for(j=1;j<=n;j++) if (i==j) a[i][j]=0; else a[i][j]=pinf;while(f>>i>>j>>c) a[i][j]=c;f.close();} void drum(int i,int j){int k=1,gasit=0;while ((k<=n) && !gasit){ if ((i!=k) && (j!=k) && (a[i][j]==a[i][k]+a[k][j])) { drum(i,k);drum(k,j); gasit=1; } k++;}if (!gasit) cout<<j<<” “;} void tipar(int nodi,int nodf){if (a[nodi][nodf]<pinf){ cout<<“drumul de la “<<nodi<<” la “<<nodf<<” are lungimea … Read more

graf eulerian

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Graf eulerian #include<fstream.h>#include<conio.h>struct nod{int nd;nod *adr_urm;};int a[10][10],s[10],n;nod *lista, *indice; void citire(char graf[10],int a[10][10],int& n){int i,j;fstream f(graf,ios::in);f>>n;while (f>>i>>j) a[i][j]=a[j][i]=1;f.close();} void ciclu(nod* v){int nodul;nod *nod_baza,*nod_gasit,*nod_urm;nod_urm=v->adr_urm;nod_baza=v;do{ nodul=1;while (a[nod_baza->nd][nodul]==0) nodul++;a[nod_baza->nd][nodul]=0;a[nodul][nod_baza->nd]=0;nod_gasit=new nod;nod_gasit->nd=nodul;nod_gasit->adr_urm=0;nod_baza->adr_urm=nod_gasit;nod_baza=nod_gasit;}while (nod_gasit->nd!=v->nd);nod_baza->adr_urm=nod_urm;} int adauga(){int i,gasit=0;indice=lista;while(indice && !gasit){for(i=1;i<=n;i++)if (a[indice->nd][i]==1) gasit=1;if (!gasit) indice=indice->adr_urm;}if(indice){ciclu(indice);return 1;}else return 0;} int grade_pare(){int i=1,j,s,gasit=0;while ((i<=n) && !gasit ){s=0;for(j=1;j<=n;j++) s+=a[i][j];if (s%2) gasit=1;i++;}return !gasit;} void df(int nod){int k;s[nod]=1;for(k=1;k<=n;k++)if … Read more

parcurgere in latime bf recursiv

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#include<fstream.h>#include<conio.h>struct nod{int inf;nod* adr;}; nod* l[20];int c[20],s[20],i,sf,n; void citire(char fisier[20],nod* l[20],int& n){nod* p;int i,j;fstream f(fisier,ios::in);f>>n;for(i=1;i<=n;i++) l[i]=0;while(f>>i>>j){p=new nod;p->adr=l[i];p->inf=j;l[i]=p;}f.close();} void bf(){nod* p;if(i<=sf){p=l[c[i]];while(p){if(s[p->inf]==0){sf++;c[sf]=p->inf;s[p->inf]=1;}p=p->adr;}i++;bf();}} void main(){citire(“graf.txt”,l,n);i=1;sf=1;c[1]=1;s[1]=1;bf();for(int i=1;i<=sf;i++) cout<<c[i]<<” “;cout<<endl;getch();} {joscommentenable}