题解 | #整数与IP地址间的转换#

#include <iostream>
using namespace std;

int main() {
    long long a,b,c,d;
    long long num;
    while(scanf("%lld.%lld.%lld.%lld", &a,&b,&c,&d)!=EOF){
        cin>>num;
        cout<<(a<<24) + (b<<16) + (c<<8) + d<<endl;
        a = num>>24;
        num = num - (a<<24);
        b = num>>16;
        num = num - (b<<16);
        c = num>>8;
        d = num - (c<<8);
        cout <<a<<'.'<<b<<'.'<<c<<'.'<<d;
    }
}
// 64 位输出请用 printf("%lld")