hdu1047

大数相加，不过这类最好是他们的位数相同，便于相加；


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

string add(string str1, string str2)
{
    int len1 = str1.length();
    int len2 = str2.length();
    if(len1 < len2)
    {
        for(int i = 0; i < len2-len1; i++)
        {
            str1 = "0"+str1;
        }
    }
    else
    {
        for(int i = 0; i < len1-len2; i++)
        {
            str2 = "0"+str2;
        }
    }
    int len = str1.length();
    int p = 0;
    int temp = 0;
    string str;
    for(int i = len-1; i >= 0; i--)
    {
        temp = str1[i]-'0'+str2[i]-'0'+p;
        p = temp/10;
        temp %= 10;
        str = char(temp+'0') + str;
    }
    if(p)
        str = char(p+'0') + str;
    return str;
}

int main()
{
    int t;
    cin >> t;
    string str, sum;
    
    while(t--)
    {
        sum = "0";
        while(cin >> str)
        {
            if(str == "0")break;
            sum = add(sum, str);
        }
        cout << sum << endl;
        if(t)
            cout << endl;
    }

}