题解 | #整数与IP地址间的转换#按照输入格式粗暴分类

#include <bitset>
#include <iostream>
#include <string>
using namespace std;

int main() {
    string str1;
    string str2;
    int num=0;
    long ans_out1=0;
    getline(cin, str1);
    getline(cin, str2);
    string temp_string=str1;
    string string_out;
    int total_len=str1.size();
    for (int temp=0; temp<4; temp++) 
    {
        string temp_answer;
        total_len=temp_string.size();
        int temp_num=temp_string.find('.');
        temp_answer=temp_string.substr(0,temp_num);
        temp_string=temp_string.substr(temp_num+1,total_len-temp_num-1);
        double num_for_answer=1;
        for(int i=3;i>temp;i--)
            num_for_answer=num_for_answer*256;
        ans_out1=ans_out1+stoi(temp_answer)*num_for_answer;
    }
    cout<<ans_out1<<endl;
    long total_num=stol(str2);
    long temp_num2=total_num;
    for (int temp=0; temp<4; temp++) 
    {
        int answer_num=0;
        long num_for_answer=1;
        if(temp<3)
        {
            for(int i=3;i>temp;i--)
            num_for_answer=num_for_answer*256;
        }
        answer_num=temp_num2/num_for_answer;
        string_out=string_out+to_string(answer_num);     
        if(temp!=3)
        string_out=string_out+".";
        temp_num2=temp_num2%num_for_answer;
    }
    cout<<string_out<<endl;
}
// 64 位输出请用 printf("%lld")