quis no 3 C++

#include”iostream.h”
#include”stdio.h”
#include”conio.h”
#include”string.h”

double nilai(double nMID, double NS);
double xNH(double nMID, double NS);

double xnilai(double NA);

void main(){

char nama[20];
char NPM[7];
double nMID=0;
double NA=0;
double NS=0;
char NH[1];
double xnilai=0;
double xNA=0;
double xNH=0;
char ket[5];

cout<<”Program Untuk Menghitung Kelulusan Mahasiswa”; cout<<”\n——————————————-\n”; cout<<”Nama : “; cin>>nama;
cout<<”NPM : “; cin>>NPM;
cout<<”Nilai MID : “; cin>>nMID;
cout<<”Nilai Semester : “; cin>>NS;
cout<<”Nilai Akhir : “<=80){
strcpy (NH, “A”);
} else if(xNH(nMID, NS)>=70){
strcpy (NH, “B”);
} else if(xNH(nMID, NS)>=60){
strcpy (NH, “C”);
} else if(xNH(nMID, NS)>=50){
strcpy (NH, “D”);
} else if(xNH(nMID, NS)<50){ strcpy (NH, “E”); } else { strcpy (NH, ” “); } return(NH[1]); } double xnilai(double NA){ char ket[5]; if(NA>50){
strcpy (ket, “Lulus”);
} else if(NA<50){
strcpy (ket, “Gagal”);
} else {
strcpy (ket, ” “);
}
return(ket[5]);
}