为什么我会遇到细分错误：11？

Question

I'm trying to learn c, so I have been trying to figure out why I have segmentation fault for the last 2 hours; On paper it looks like the code should work..

So the purpose of the procedure is to ask the user to enter the size they need in heap, then ask them to enter the numbers, but the numbers must be unique.

Please excuse me if this is badly indented code, I'm still a beginner

int size ; // The size to allocate
int input ; // the number the user will enter from keyboard
int count  = 0 ; // how many numbers have been added


printf ("Enter the number of integers to process: \n");
scanf ("%d" , &size) ;
int* t;
int* c= (int*)malloc (size* sizeof (int));

if ((t = c))
while (count<size)
{
  printf("Enter value #%d\n" , count+1) ;
  scanf ("%d" , &input) ;

  if (count != 0)
  while (t<= t+count-1)
  {

      if (*t == input)
      {
         printf ("You have entered %d already\n", input);
         printf("Enter value #%d\n" , count+1) ;
         scanf ("%d" , &input) ;
         t = c ;
      }
    else
     t++;
  }

  t = c ;
  c[count] = input ;
  sum += c[count] ;
  count ++ ;
}

Answer 1

应该是while (t<= c+count-1)而不是while (t<= t+count-1)后一种情况始终为真。