Query ane kek gini acak"an soalnya bingung gan gak mudeng materinya kalau ada yang bisa mohon bantuannya ya

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int n;

struct mebel{

char kode[10];

char nama[30];

char bahan[20];

int jumlah;

float harga;

};

struct mebel *m = (struct mebel*)malloc(sizeof(struct mebel));

void satu(){ int n;

 printf(" == INPUT BARANG == \n");

 printf(" Banyak Barang Yang Akan Anda Masukkan : "); scanf("%d",&n);

 for(int i=0; i<n; i++) {

 printf("\n :: Kode Barang : : "); scanf("%s",&m->kode);

 printf(" :: Nama Barang : : "); scanf("%s",&m->nama);

 printf(" :: Bahan Dasar : : "); scanf("%s",&m->bahan);

 printf(" :: Jumlah : : "); scanf("%d",&m->jumlah);

 printf(" :: Harga Per Unit : : Rp. "); scanf("%f",&m->harga);

 printf("\n");

}

}

void dua(){

 printf("\n :: Kode Barang : : %s \n",m->kode);

 printf(" :: Nama Barang : : %s \n",m->nama);

 printf(" :: Bahan Dasar : : %s \n",m->bahan);

 printf(" :: Jumlah : : %d \n",m->jumlah);

 printf(" :: Harga Per Unit : : Rp. .2f \n",m->harga);

 printf("\n");



}

void main() {

 menu:

 int pilihan;

 clrscr();

 

 printf("\t\t\n");

 printf("\t\n");



 printf("\t\n");

 printf("\t| |\n");

 printf("\t| 1. Input Barang |\n");

 printf("\t| 2. Lihat Stok Barang |\n");

 printf("\t| 3. Exit |\n");

 printf("\t| |\n");

 printf("\t| |\n");

 printf("\t| PILIH[1,2,3]: |\n");

 printf("\t| |\n");

 printf("\t| |\n");

 printf("\t\n");

 printf("\t3 * * * * * * * * * * * * * * * * * * * * * * * * * * * 3\n");

 

 gotoxy(3,24);printf("Date = %s", __DATE__);

 gotoxy(65,24);printf("Time = %s", __TIME__);

 gotoxy(43,13);scanf("%d",&pilihan);

 clrscr();

 switch(pilihan) {

 case 1:

 satu();

 goto menu;

 case 2:

 dua();

 break;

 goto menu;

 case 3: printf("\n");

 _exit(0);

 default: goto menu; }





}