new 2 inputan mahasiswa

#include"iostream.h"
#include"stdlib.h"
#include"stdio.h"
#include"conio.h"

void main()
{
char i1[30];
char i2[30];
char i3[40];
char i4[30];
int i;
char d;
int n;
system("cls");
cout<<"Input NPM Mahasiswa ";cin>>i;
cout< printf("Input Nama Mahasiswa ");gets(i1);
cout< printf("Input kelas ");gets(i2);
cout< cout<<"Input Alamat ";cin>>i3;
cout< cout<<"Input jenis kelamin ";cin>>i4;
cout<
printf("Tampilkan:\n");

for( int j = 0; j < n; j++)

printf("NPM Mahasiswa : %i \n",i);
printf("Nama Mahasiswa : %s \n",i1);
printf("kelas : %s \n",i2);
printf("Alamat : %s \n",i3);
printf("jenis kelamin : %s \n",i4);


}