#include<stdio.h>
#include<string.h>
int a,b,c,d;
int main()
{  void tongji( char a[]);
   char str[99];
   printf("please enter a string!\n");
   gets(str);
   tongji(str);
   printf("字母的个数为%d\n数字的个数为%d\n空格的个数为%d\n其他字符的个数为%d\n",a,b,c,d);
   return 0;
}
void tongji(char a[])
{   int i;
    for(i=0;a[i]!='\0';i++)
    {
        if((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z')) a++;
        else if(a[i]>='1'&&a[i]<='9') b++;
        else if(a[i]==' ') c++;
        else d++;
    }
}