自定义大整数类BigInt数据结构

面向对象

#include <bits/stdc++.h>
using namespace std;
class BigInt {
private:
    string num;
public:
    #define proces() do { \
        if (t > '9') {     \
            t -= 10;        \
            flag = true;    \
        } else {            \
            flag = false;    \
        }                    \
        c += t;             \
        i++;                \
    } while (0)

    BigInt(string s, bool bRevs = true) {
        num = move(s);
        if (bRevs) reverse(num.begin(), num.end());
    }
    BigInt operator + (BigInt &b) {
        string c;
        int i = 0;
        bool flag = false;
        char t;
        while (i < num.size() && i < b.num.size()) {
            char t = num[i] + b.num[i] - '0' + (flag ? 1 : 0);
            proces();
        }
        while (i < num.size()) {
            char t = num[i] + (flag ? 1 : 0);
            proces();
        }
        while (i < b.num.size()) {
            char t = b.num[i] + (flag ? 1 : 0);
            proces();
        }
        if (flag) c += '1';
        return BigInt(c, false);
    }
    friend ostream &operator << (ostream &out, const BigInt &n);
};
ostream &operator << (ostream &out, const BigInt &a) {
    for (int i = a.num.size() - 1; ~i; --i) {
        out << a.num[i];
    }
    return out;
}
int main() {
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    string s1, s2;
    while (cin >> s1 >> s2) {
        BigInt n1(s1), n2(s2);
        cout << (n1 + n2) << endl;
    }
    return 0;
}