Program C++ IP Mahasiswa

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <string.h>
main ()
{
 int m,k;
 int jumlah,nilai,sks,bobot,mk;
 char nama[50],nrp[10],kuliah[50];
 float sigmasks=0, sigmasksbobot=0,ip,sigmaip=0,ratamhs;
 cout <<"-------------------------------"<<endl;
 cout <<"| Nilai Akhir  | Mutu  | Bobot |"<<endl;
 cout <<"-------------------------------"<<endl;
 cout <<"|     0-45     |  E    |   0   |"<<endl;
 cout <<"|    46-59     |  D    |   1   |"<<endl;
 cout <<"|    60-75     |  C    |   2   |"<<endl;
 cout <<"|    76-85     |  B    |   3   |"<<endl;
 cout <<"|    86-100    |  A    |   4   |"<<endl;
 cout <<"-------------------------------"<<endl;
 cout <<endl;
 cout<<"Masukan jumlah Mahasiswa        = ";
 cin>>jumlah;

 for(m=0;m<jumlah;++m)
 {
  cout<<endl;
  cout<<"Masukan NRP Mahasiswa         = ";
  cin>>nrp;
  cout<<"Masukan Nama Mahasiswa        = ";
  gets(nama);
  cout<<"Masukan Banyak Mata Kuliah    = ";
  cin>>mk;

 for(k=0;k<mk;++k)
  {
   cout<<"Masukan nama mata kuliah      = ";
   gets (kuliah);
   cout<<"Masukan Nilai Anda            = ";
   cin>>nilai;
   if (nilai<=45)
   {
    cout<<"Mutu = E\n";
    bobot =0;
   }
   else if (nilai<=59)
   {
    cout<<"Mutu = D\n";
    bobot =1;
   }
   else if (nilai<=75)
   {
    cout<<"Mutu = C\n";
    bobot =2;
   }
   else if (nilai<=85)
   {
    cout<<"Mutu =B\n";
    bobot =3;
   }
   else if (nilai<=100)
   {
    cout<<"Mutu = A\n";
    bobot =4;
   }
   cout<<"Masukan SKS                   = ";
   cin>>sks;
   sigmasks += sks;
   sigmasksbobot += (sks*bobot);
  }
   cout<<endl;
   ip = sigmasksbobot / sigmasks ;
   cout<<endl;
   cout<<"NRP     : "<<nrp<<endl;
   cout<<"Nama    : "<<nama<<endl;
   cout<<"IP      : "<<ip<<endl;
   sigmaip += ip;

  }
   cout<<endl;
   ratamhs = sigmaip / m;
   cout<<"Rata-Rata IP Mahasiswa adalah : "<<ratamhs;
   getch();
}