#include<stdio.h>
int main()
{
    char a;
    int Z,S;
    a=getchar();
    while(a!='#')
    {    if(a>='0'&&a<='9')
            S++;
        else if(a>='a'&&a<='z'||a>='A'&&a<='Z')
            Z++;
        a=getchar();   
    }
    printf("字母：%d个，数字：%d个",Z,S);
        return0；
 }

不行  改了之后的
#include<stdio.h>
int main()
{
    char a;
    int z,s;
    a=getchar();
    while(a!='#')
    {    if(a>='0'&&a<='9')
            s++;
        else if(a>='a'&&a<='z'||a>='A'&&a<='Z')
            z++;
        a=getchar();   
    }
    printf("字母：%d个，数字：%d个",z,s);
    return 0;
 }

int main()
{
    char a;
    int z=0,s=0;
    a=getchar();
    while(a!='#')
    {    if(a>='0'&&a<='9')
            s++;
        else if(a>='a'&&a<='z'||a>='A'&&a<='Z')
            z++;
        a=getchar();   
    }
    printf("字母：%d个，数字：%d个",z,s);
    return 0;
 }

回车还是不行