Arce incidente

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//se afiseaza arcele incidente spre exterior/interior ale varfului i
#include <stdio.h>
#include <conio.h>

void main(void)
{
int a[50][50],n,i,j;
FILE *f=fopen("c:intrare.txt","r");

fscanf(f,"%d",&n);
 for(i=1;i<=n;i++)
 for(j=1;j<=n;j++)
     fscanf(f,"%d",&a[i][j]);
fclose(f);

for(i=1;i<=n;i++)
 {
   printf("nArcele incidente catre exterior din vf %d sunt:",i);
   for(j=1;j<=n;j++)
    if(a[i][j]==1) printf(" [%d-%d]",i,j);
 }
for(i=1;i<=n;i++)
 {
   printf("nArcele incidente catre interior spre vf %d sunt:",i);
   for(j=1;j<=n;j++)
    if(a[j][i]==1) printf(" [%d-%d]",j,i);
 }
getch();
}