menghitung ip dengan c++

#include
#include
#include
main()
{
char *gr,*ket;
char nim[8],nam[10];
float rt,abs,tgs,uts,uas;
clrscr();
cout<<"Input NIM :";cin>>nim;
cout<<"Input Nama Mahasiswa :";cin>>nam;
cout<<"Input Nilai Absen :";cin>>abs;
cout<<"Input Nilai Tugas :";cin>>tgs;
cout<<"Input Nilai UTS :";cin>>uts;
cout<<"Input Nilai UAS :";cin>>uas;
rt=(0.1*abs)+(0.2*tgs)+(0.3*uts)+(0.4*uas);
if(rt>=85)
{
gr ="A";
ket="Sangat Baik";
}
else if(rt>=75)
{
gr ="B";
ket="Baik";
}
else if(rt>=60)
{
gr ="C";
ket="Cukup";
}
else if(rt>=45)
{
gr ="D";
ket="Kurang";
}
else
{
gr ="E";
ket="Sangat Kurang";
}
cout<<"\t\tAKADEMI \"UNIVERSITAS TEKNOLOGI YOGYAKARTA\""<
cout<<"\tJl RINGROAD UTARA JOMBOR"<
cout<<"----------------------------------------------"<
cout<<"NIM :"<<
cout<<"Nama Mahasiswa :"<<
cout<<"Nilai Absen :"<<
cout<<"Nilai Tugas :"<<
cout<<"Nilai UTS :"<<
cout<<"Nilai UAS :"<<
cout<<"----------------------------------------------"<
cout<<"Rata rata :"<<
cout<<"Grade :"<<
cout<<"Keterangan :"<<
cout<<"----------------------------------------------"<
getch();
}