roy floyd-grafuri orientate

#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 “
<<a[nodi][nodf]<<endl;
cout<<nodi<<” “;
drum(nodi,nodf);
}
else
cout<<“nu exista drum”;
}

void lungime()
{
int i,j,k;
for(k=1;k<=n;k++)
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
if (a[i][j]>a[i][k]+a[k][j])
a[i][j]=a[i][k]+a[k][j];
}

void main()
{
citire(“ponderi.txt”,a,n);
lungime();
tipar(4,2);
getch();
}

{joscommentenable}