How to use the switch statement for character statistics

#include <stdio.h>
void cotTime();
main()
{
   cotTime();
}
void cotTime()
{
  int c, i, nwhite, nother, ndigit[10];
  nwhite = nother = 0;
  for(i=0;i<10;i++)
  {
    ndigit[i] = 0;
  }
  while((c = getchar()) != EOF)
  {
    switch(c)
 {
    case '0': case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8': case '9':
    
    ndigit[c-'0'] += 1;
    break;

    case ' ': case '/t': case '/n':
    nwhite++; break;

    default:
    nother++;
    break;
 }
  }
  printf("digits = ");
  for(i=0;i<10;i++)
  {
    printf(" %d",ndigit[i]);
  }
  printf(", white space = %d, other = %d/n", nwhite, nother);
  return 0;
}