how to use the return type of "fgetc" blow the code?

Question

#include <stdio.h>

int main ()
{
   FILE *fp;
   int c;

   fp = fopen("file.txt","r");
   while(1)
   {
      c = fgetc(fp);
      if( feof(fp) )
      {
          break ;
      }
      printf("%c", c);
   }
   fclose(fp);
   return(0);
}

here in the code,the fgetc(fp) use the int as this return type,so why we use "printf("%c",c);" rather than "print("%d",c);"

Answer 1

In a printf format string, %c means “convert the int argument to an unsigned char and print the character it is the code for.”

%d means “convert the int argument to a decimal numeral and print that numeral.”