hdu 6225 Little Boxes

题目链接

简单题，大数相加

C++：

#include<cstdio>
#include<iostream>
#include<cmath>
using namespace std;

string sum(string s1,string s2)
{
    if(s1.length()<s2.length())
    {
        string temp=s1;
        s1=s2;
        s2=temp;
    }
    int i,j;
    for(i=s1.length()-1,j=s2.length()-1;i>=0;i--,j--)
    {
        s1[i]=char(s1[i]+(j>=0?s2[j]-'0':0));   
        if(s1[i]-'0'>=10)
        {
            s1[i]=char((s1[i]-'0')%10+'0');
            if(i) s1[i-1]++;
            else s1='1'+s1;
        }
    }
    return s1;
}

int main(){
	int t;
	string a="",b="",c="",d="";
	while(cin>>t){
		
		while(t--){
			cin>>a>>b>>c>>d;
			string s1="",s2="";
			s1=sum(a,b);
			s2=sum(c,d);
			string ans=sum(s1,s2);
			cout<<ans<<endl;
		}
		
	}
	return 0;
}

java：

import java.util.Scanner;
import java.math.BigInteger;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        for(int i=0;i<t;i++) {
        	 BigInteger a = sc.nextBigInteger();
        	 BigInteger b = sc.nextBigInteger();
        	 BigInteger c = sc.nextBigInteger();
        	 BigInteger d = sc.nextBigInteger();
        	 BigInteger ans;
        	 ans=a.add(b);
        	 ans=ans.add(c.add(d));
        	 System.out.println(ans);
        }
        
        sc.close();
	}
}