题目1203：IP地址

#include <cstdio>
#include <cstdlib>
using namespace std;
bool check_valid(char *str){
    int count = 0;
    char *begin = str;
    bool end_flag = false;
    for(char *p = str; !end_flag; ++p){
        if(‘.‘ == *p || ‘\0‘ == *p){
            if(*p == ‘\0‘){
                end_flag = true;
            }
            if(p <= begin){
                return false;
            }
            *p = ‘\0‘;
            long n = strtol(begin, &p, 10);
            if(n > 255 || n < 0){
                return false;
            }
            begin = p + 1;
            ++count;
            if(count > 4){
                return false;
            }
        }
    }
    return count == 4;
}

int main() {
    int n = 0;
    while(scanf("%d\n", &n) != EOF && n > 0){
        char str[256] = {0};
        for(int i = 0; i < n; ++i){
            scanf("%s", str);
            printf("%s\n", check_valid(str) ? "Yes!" : "No!");
        }
    }
    return 0;
}