Menghitung Biaya Semester

#include
#include
#include
#define sistem informasi 30000
#define akuntansi 20000
#define manajemen 25000
main ()
{
char nama [30], ket[30];
float semester,total,sks;
int Nim,kode;
clrscr;
printf("Program Total Pembayaran Mahasiswa\n");
printf("===================================\n");
printf("nama mahasiswa : ");scanf("\n%s",&nama);
printf("Masukkan Nim : ");scanf("%i",&Nim);
printf("\n pilih kode jurusan [1/2/3] : "); kode=getche ();
printf("\n Masukkan jumlah sks : ");scanf("%f",&sks);
switch(kode)
{
case'1':{strcpy(ket,"jurusan sistem informasi");
sks=30000*sks;printf("\nbiaya sks : %.f",sks);
semester=sks*2;printf("\nbiaya semester : %.f",semester);
total=sks+semester;printf("\ntotal biaya semester : %.f",total);
break;}
case'2':{strcpy(ket,"jurusan akuntansi");
sks=20000*sks; printf("\nbiaya sks : %.f",sks);
semester=sks*2;printf("\nbiaya semester : %.f",semester);
total=sks+semester;printf("\ntotal biaya semester : %.f",total);
break;}
case'3':{strcpy(ket,"jurusan manajemen");
sks=25000*sks;printf("\nbiaya sks : %.f",sks);
semester=sks*2; printf("\nbiaya semester : %.f",semester);
total=sks+semester;printf("\ntotal biaya semester : %.f",total);
break;}
default:{ strcpy(ket,"kode jurusan salah");
printf("\n keluar");
break;}

}
printf("\n======================================");
printf("\n Created by Ferdy Vilnius");
printf("\n Sistem Informasi");
printf("\n 10411005");
printf("\n======================================");
getch();
return(0);
}