请将此代码转成c++98编译器兼容的形式

好的，我将代码修改为与C++98编译器兼容的形式。主要更改的地方是使用传统的for循环替代了C++11中的范围for循环，以及将auto关键字替换为具体的类型。

#include <iostream>
#include <vector>
#include <cmath>
#include <limits>
#include <algorithm>

using namespace std;

struct Edge {
    int source;
    int target;
    double weight;
};

bool arbitrage(int n, vector<string>& currencies, vector<Edge>& edges) {
    vector<double> distance(n, numeric_limits<double>::max());
    distance[0] = 0;

    for (int i = 0; i < n - 1; i++) {
        for (int j = 0; j < edges.size(); j++) {
            double newDistance = distance[edges[j].source] - log(edges[j].weight);
            if (newDistance < distance[edges[j].target]) {
                distance[edges[j].target] = newDistance;
            }
        }
    }

    for (int i = 0; i < edges.size(); i++) {
        if (distance[edges[i].source] - log(edges[i].weight) < distance[edges[i].target]) {
            return true;
        }
    }

    return false;
}

int main() {
    int n;
    while (cin >> n && n != 0) {
        vector<string> currencies(n);
        for (int i = 0; i < n; i++) {
            cin >> currencies[i];
        }

        int m;
        cin >> m;

        vector<Edge> edges;
        for (int i = 0; i < m; i++) {
            string ci, cj;
            double rij;
            cin >> ci >> rij >> cj;

            int source = find(currencies.begin(), currencies.end(), ci) - currencies.begin();
            int target = find(currencies.begin(), currencies.end(), cj) - currencies.begin();

            edges.push_back(Edge());
            edges[i].source = source;
            edges[i].target = target;
            edges[i].weight = rij;
        }

        bool result = arbitrage(n, currencies, edges);
        cout << (result ? "Yes" : "No") << endl;
    }

    return 0;
}

这样，代码就与C++98编译器兼容了。如果还有其他问题，请随时提问。