杭电-------2043密码（C语言写）

#include<stdio.h>
#include<string.h>

char a[];
char b[] = { '~','!','@','#','$','%','^' };
int c[] = {  };
int main() {
    int m;
    scanf("%d", &m);
    int i, j;
    int flag;
    for (i = ; i < m; i++) {
        scanf("%s", a);
        c[] = ;
        c[] = ;
        c[] = ;
        c[] = ;
        flag = ;
        if (strlen(a) <  || strlen(a) > ) {
            printf("NO\n");
            continue;
        }
        for (j = ; j < strlen(a); j++) {
            if (a[j] <= 'Z'&&a[j] >= 'A') { c[]++; }
            if (a[j] <= 'z'&&a[j] >= 'a') { c[]++; }
            if (a[j] <= ''&&a[j] >= '') { c[]++; }
            if (strchr(b, a[j]) != NULL) { c[]++; }
        }
        for (j = ; j < ; j++) {
            if (c[j] > ) {
                flag++;
            }
        }
        if (flag >= ) {
            printf("YES\n");
        }
        else {
            printf("NO\n");
        }
    }
    return ;
}