cpp文件的反复读取

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#include <fstream>
using namespace std;
 
int main() {
   ofstream outfile;
   
   outfile.open("1.txt");
   outfile << "test1" << endl;
   outfile.close();

   outfile.open("2.txt");
   outfile << "test2" << endl;
   outfile.close();
}

C++中一个打开文件的流可以多次打开不同的文件