程序代码：

#include<stdio.h>
void main()
{
   char *p;
   char str[1000];
   int i=0;
   int low=0,num=0,other=0;
   for(;i<1000;i++)
   {
      char ch=getchar();
      if(ch=='!')
      break;
      else
      str[i]=ch;
   }

 
   str[i]='\0';
  
   p=&str[0];

 
   while(*p)
  {
    if(*p>='a'&&*p<='z')
    low++;
    else if(*p>='0'&&*p<='9')
    num++;
    else
    other++;
  
    p++;
  }
  printf("\n小写字母:%d,数字:%d,其它:%d\n",low,num,other);
}

程序代码：

#include <stdio.h>
#include <ctype.h>
#include <conio.h>

int main(void)
{
    char c;
    unsigned int aaa=0;
    unsigned int bbb=0;
    unsigned int ccc=0;

    while (c = getch(), '!' != c)
    {
        if (islower(c))
        {
            aaa++;
        }
        else if (isdigit(c))
        {
            bbb++;
        }
        else
        {
            ccc++;
        }
    }

    printf("小写个数:\t%d", aaa);
    printf("数字个数:\t%d", bbb);
    printf("其他XXXX:\t%d\n", ccc);


    return 0;
}