Thread: Counting quantity of different digits

What I'm doing wrong . . .
I need to count quantity of different digits in number
for example 321123 : and output i want like that

There r 3 different digits in the number 321123

Code:

 while(n)
 
	   {  dif=n%10;
	   n/=10;
	   if (dif=n%10)
		   n/=10;
	   else
	   count++;
	   }
	   printf("\nThere r  ",count);
	   printf(" different digits in the number",n);