Fungsi Return

#include< stdio.h>
#include< conio.h>
#include< iostream.h>

char ket(float n);
garis()
{
cout<<"-----------------------"<< endl;
}
main( )
{
int i, j=1, k=1;
struct
{
char nim[5];
char nama[15];
float nilai;
} mhs[5];

clrscr( );
for(i=0; i<2; i++)
{
garis();
cout<<"Data Ke - "<< j++<< endl;
cout<<"masukan NIM = "; cin>>mhs[i].nim;
cout<<"masukan Nama = "; cin>>mhs[i].nama;
cout<<"masukan Nilai Akhir = "; cin>>mhs[i].nilai;
garis();
cout<< endl;
}
clrscr( );
for(i=0; i<2; i++)
{
garis();
cout<<"Data Ke - "<< k++<< endl;
cout<<"NIM = "<cout<<"Nama = "<cout<<"Nilai Akhir = "<cout<<"Keterangan yang didapat = ";
cout<garis();
cout<< endl;
}
getch( );
}

char ket(float n)
{

if(n > 65)
return 'LK';
else
return 'PR';
}