#include"stdio.h"
void main()
{
    int zongshu=0,zimushu=0,shuzishu=0,kongge=0;
    char c;

    while((c=getchar())!='\n')
    {
        zongshu+=1;
        
        if(c>='0'&&c<='9')
        {
            shuzishu+=1;
        }

        if(c>='A'&&c<'Z'||c>='a'&&c<='z')
        {
            zimushu+=1;
        }

        if(c=' ')
        {
            kongge+=1;
        }
    }

    printf("总数=%d\n数字数=%d\n字母数=%d\n空格数=%d\n",zongshu,shuzishu,zimushu,kongge);

}

c=' '
==

啊呀，对啊!呵呵， 我想半天

谢谢