题解 | IP地址(bupt)

#include <iostream>
using namespace std;

int main() {
        int a,b,c,d;
        while(scanf("%d.%d.%d.%d",&a,&b,&c,&d)!=EOF)
        {
        if((0<=a&&a<=255)&&(0<=b&&b<=255)&&(0<=c&&c<=255)&&(0<=d&&d<=255))
        {
            cout << "Yes!" << endl;
        }
        else
        {
            cout << "No!" << endl;
        }
        }
}