C++ 运行结果保存到文本中

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main() {
    ofstream out("output.txt");
    for (int i = 1; i < 100; ++i) {
        for (int j = 1; j <= i; ++j) {
            out << i << "x" << j << "=" << i * j<<"\t";
        }
        cout << endl;
    }
    out.close();
    return 0;
}