解析如何利用switch语句进行字符统计

#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;
}