杭code 1002

注意最后一次输出结果，不用在末尾加入空格。【神奇的错误】

#include <iostream>#include <algorithm>#include <fstream>#include <string>#include <vector>#include <time.h>#include <direct.h>#include <io.h>#include <stdlib.h>#include <cassert>#include <numeric> #include <functional>  #include <iterator>  #include <map>#include <cstdlib>#include <cmath>#include <vector>#include <stack>#include <queue>using namespace std;int main(){    int caseNum;    cin >> caseNum;    int nowIndex = 1;    while (nowIndex <= caseNum) {        string a, b; // gain input string number        cin >> a >> b;        string result;        int c = 0;        int left = 0;        int sum = 0;        int i = a.size()-1;        int j = b.size()-1;        while (i >= 0 || j >= 0 || c > 0) {            sum = 0;            // gain sum            if (i >= 0)                sum += a[i] - '0';            if (j >= 0)                sum += b[j] - '0';            sum += c;            // gain c and left            c = sum / 10;            left = sum % 10;            // save result [reverse]            result += left+'0';            i--; j--;        }        cout << "Case " << nowIndex << ":" << endl;        cout << a << " + " << b << " = ";        for(int i = result.size()-1;i>=0;i--)            cout<<result[i];        if (nowIndex < caseNum)            cout << endl << endl;        else            cout << endl;        nowIndex++;    }    return 1;}