Programming Homework Help

#include<stdio.h>
#include<string.h>
int main()
{
  char a[10000],ar[100][10000];
  int i,j,k,m,n,l,len[10000],c;
  freopen(“input.txt”,”r”,stdin);
  while(gets(a))
  {
  k=0;
  i=0;
  c=0;
  for(j=0; ; ++k)
  {
  if(a[k]==’ ‘ || a[k]==’’)
  {
  ar[i][j]=’’;
  len[i]=c;
  if(a[k]==’’) break;
  i++;
  j=0;
  c=0;
  }
  else
  {
  ar[i][j]=a[k];
  c++;
  j++;
  }
  }
  for(m=0; m<=i; m++)
  {
  for(n=(len[m]-1); n>=0; n–)
  {
  printf(“%c”,ar[m][n]);
  }
  printf(” “);
  }
  printf(“n”);
  }
  return 0;
}
here above i have submitted my code?

I am getting presentation error.

I want to know the reason.