Program mebuat data dua file

#include<iostream>
#include<fstream>
#include<conio.h>
using namespace std;
int main(){
char nama[20];
char nim[20];
int jumlah;
char dosen[20];
char mk[20];
int jum;
cout<<"masukan jumlah mahasiswa: ";
cin>>jumlah;
cout<<"maukan jumlah DOSEN : ";
cin>>jum;
ofstream save;
save.open("mahasiswa.txt",ios::app);
for(int i=1;i<=jumlah;i++){
cout<<"NAMA : ";
cin>>nama;
save<<"NAMA : "<<nama<<endl;
cout<<"Nim : ";
cin>>nim;
save<<"Nim : "<<nim<<endl;
}
save.close();
save.open("dosen.txt",ios::app);
for(int i=1;i<=jum;i++){
cout<<"NAMA DOSEN : ";
cin>>dosen;
save<<"NAMA DOSEN : "<<dosen<<endl;
cout<<"MK : "<<mk<<endl;
}
save.close();
}