C Program to Displaying printable characters plus whitspace names

#include 
#include 

int main(void)
{
  char ch = 0;                       /* Character code value */
  for(int i = 0 ; i<128 ; i++)
  {
    ch = (char)i;
    if(ch%2==0)
      printf("\n");
    printf("  %4d",ch);
    if(isgraph(ch))
      printf("               %c",ch);
    else
      switch(ch)
    {
        case '\n':
           printf("         newline",ch);
           break;
        case ' ':
           printf("           space",ch);
           break;
        case '\t':
           printf("  horizontal tab",ch);
           break;
        case '\v':
           printf("    vertical tab",ch);
           break;
         case '\f':
           printf("       form feed",ch);
           break;
        default:
           printf("                ");
           break;

    }

  }
  printf("\n");
 return 0;
}