文件流代码

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#include <iostream> #include <fstream> using namespace std; int main(int argc, char** argv) { //  char data[100]; //  ofstream out; //  out.open("lll.txt"); //  cin.getline(data,100); //  out<<data<<endl; //  out.close(); //  //  ifstream in; //  in.open("lll.txt"); //  in>>data; //  in.close(); //  cout<<data;           char data[100];     ofstream on;     ifstream in;     cin.getline(data,100);     for(int i=0;i<10;i++){         on.open("lll"+to_string(i)+".txt",ios::trunc);         on<<data<<endl;         on.close();                   in.open("lll"+to_string(i)+".txt");         in>>data;         in.close();         cout<<data<<endl;                         }                       return 0; }