how to print variable number of characters in c using printf()

i want to print variable number of # for making a pattern like this:

#  
##  
###    
####    

but the code I am using is not working correctly.....Here's what I wrote for the first time:

#include<stdio.h>
 void main()
{ int i;
  for(i=1;i<=4;i++)
  printf("%*c",i,'#');
}

And the output was:

#  
 #  
  #    
   #    

then I tried to replace printf("%*c",i,'#'); with printf("%.*s",i,"#"); but it still didn't work.... this time the output was:

#
#
#
#

note: I want to do it with printf() only and not with the nested loop method because i want to make some other pattern which contains this part.... so if this one is clear to me then I would be able to make that pattern.....