题解 | #整数与IP地址间的转换#

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    long long a,b,c,d,num;
    while(scanf("%lld.%lld.%lld.%lld%lld",&a,&b,&c,&d,&num)!=EOF)
    {
        cout<<(a<<24)+(b<<16)+(c<<8)+d<<endl;
        cout<<(num>>24)<<"." ;
        num -= (num>>24<<24);
        cout<<(num>>16)<<"." ;
        num -= (num>>16<<16);
        cout<<(num>>8)<<"."<<num-(num>>8<<8);
    }
}