C语言：统计数字空格其他字符程序

#include <stdio.h>

int main()
{
char t;
int num=0;
int spac=0;
int other=0;
int sum=0;
printf("Please input:\n");

while(1)
{
t=getchar();
sum++;
if(t>='0' && t<='9') num++;
else if(t==' ' || t=='\t') spac++;
else other++;
if(t=='\n') break;
}

printf("nums is %d\n",num);
printf("spaces is %d\n",spac);
printf("others is %d\n",other);
printf("sum chars is %d\n",sum);
return 0;
}