Question

一道大一计算机C语言编程题，急求答案，感激不尽！

Answer 1

#include<stdio.h>
int main()
{
    char str[100];
    int i,a,b,c,d;
    while(gets(str))
    {
        i=a=b=c=d=0;
        while(str[i]!='\0')
        {
            if(str[i]>='a'&&str[i]<='z'||str[i]>='A'&&str[i]<='Z')
                a++;
            else if(str[i]>='0'&&str[i]<='9')b++;
            else if(str[i]==' ')c++;
            else d++;
            i++;
        }
        printf("%d %d %d %d\n",a,b,c,d);
    }
}

Answer 2

不会