请问这应该怎么写，求解

Question

编写函数f，由实参传来n个字符串，n不超过5，统计这些字符串中字母 数字 空格和其他字符的个数

Answer 1

#include <stdio.h>

int f(char ** a, int n, int * l, int * d, int * s, int * o)
{
    *l = *d = *s = *o = 0;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; a[i][j] != '\0'; j++)
        {
            if ((a[i][j] >= 'a' && a[i][j] <= 'z') || (a[i][j] >= 'A' && a[i][j] <= 'Z'))
                *l += 1;
            else if (a[i][j] >= '0' && a[i][j] <= '9')
                *d += 1;
            else if (a[i][j] == ' ')
                *s += 1;
            else
                *o += 1;
        }
    }
    return 0;
}
int main()
{
    char a[100][100];
    char *p[5];
    int n;
    scanf("%d", &n);
    for (int i = 0 ; i < n; i++)
    {
        scanf(" %[^\n]s", &a[i][0]);
        p[i] = &a[i][0];
    }
    int l, d, s, o;
    f(p, n, &l, &d, &s, &o);
    printf("%d %d %d %d", l, d, s, o);
    return 0;
}