[algogeeks] File trying to read when reached EOF , WHY ????

[SAMMM]

#include<iostream>
#include<cstdio>
#include<cstring>
#include<alloc.h>
#include<cstdlib>
using namespace std;


class GraphClass
{
 int arr[1000][1000];
 int r,c;
 public:
 GraphClass()
 {
   for(int i=0;i<1000;i++)
    memset(*(arr+i),0,sizeof(*(arr+1)));
    r=c=0;
 }

 void ReadFromFile(char *str)
 {
   FILE *f;
   char buff[1000]={'\0'};
   f=fopen(str,"r");
   char *p;
   while(!feof(f))
   {
    fgets(buff,sizeof(buff),f);
    buff[strlen(buff)-1]='\0';
    printf("%s\n",buff);
    int d;c=0;
    while((p=strchr(buff,32))!=NULL)
    {
      sscanf(buff,"%d",&d);
     // printf("%d ",d);
      arr[r][c++]=d;
      strcpy(buff,p+1);
    }
    sscanf(buff,"%d",&d);
 //   printf("%d ",d);
    arr[r][c++]=d;
   // puts("");
    r++;
   }
   fclose(f);
  return;
 }

void displayGraph()
{
printf("%d %d \n",r,c);
/*
 for(int i=0;i<r;i++){
   for(int j=0;j<c;j++)
      printf("%d ",arr[i][j]); printf("\n"); }
*/
 return ;
}

};

int main(int argc, char *argv[])
{
GraphClass graph;
char str[10000];
if(argc < 2)
{ puts("ERROR cann't continue"); exit (1);}
strcpy(str,argv[1]);
graph.ReadFromFile(str);
graph.displayGraph();
return 0;
}

Suppose for a file  graph.txt
bash-3.00$ cat graph.txt
0 2 9999 3 5
2 0 1 4 9999
9999 1 0 9999 2
3 4 9999 0 1
5 9999 9999 1 0


bash-3.00$ g++ -o s Graph.cpp
ld: warning: symbol `clog' has differing types:
        (file /opt/sfw/lib/gcc-lib/sparc-sun-solaris2.8/2.95.3/libstdc+
+.so type=OBJT; file /usr/lib/libm.so type=FUNC);
        /opt/sfw/lib/gcc-lib/sparc-sun-solaris2.8/2.95.3/libstdc++.so
definition taken
bash-3.00$ ./s graph.txt
0 2 9999 3
2 0 1 4
9999 1 0 9999
3 4 9999 0
5 9999 9999 1

6 1


Now when I execute the file after compilation it give an extra column
count ... It is trying to read when the file has reached the EOF ..
Any specific reason why it is so ???


I have to check for the termination of the file content by :

while(!feof(f))
   {
    fgets(buff,sizeof(buff),f);
    buff[strlen(buff)-1]='\0';
    if(!strcmp(buff,"")) return;                      ---------->>>>>>
Have to Add it to prevent the above problm
    int d;c=0;
    while((p=strchr(buff,32))!=NULL)
    {..............

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