pupu.c

this is source code for billing system application in c language.. this program are made from dev-c

# include <stdio.h>
# include <conio2.h>
# include <string.h>
# include <dos.h>
# include <process.h>

struct sMain
	{
	char item[15];
	int code;
	int price;
	} oMain;

struct sBillRecord
	{
	int code;
	int qty;
	}; 		//oBillRecord;

struct sBill
	{
	int billno;
	char cust[25];
	int dd;
	int mm;
	int yy;
	struct sBillRecord oBillRecord[10];
	int amt;
	} oBill;

void destroya(struct sMain cMain)
	{
	strcpy(cMain.item,"");
	cMain.code=0;
	cMain.price=0;
	}

void destroyb(struct sBill cBill)
	{
	int i;
	cBill.billno=0;
	strcpy(cBill.cust,"                         ");
	//cBill.dd=0;
	//cBill.mm=0;
	//cBill.yy=0;
	for(i=0;i<10;i++)
		{
		cBill.oBillRecord[i].code=0;
		cBill.oBillRecord[i].qty=0;
		}
	cBill.amt=0;
	}
int getCurItemNo()
	{
	int n=0;
	FILE *f1;

	if((f1= fopen("./DATA/Items.dat", "rb+"))==NULL)
		{
		fprintf(stderr, "Cannot open the bill file");
		return 0;
		}
	while(!feof(f1))
		{
		fread(&oMain,sizeof(oMain)+1,1,f1);
		n=getMax(n,oMain.code);
		}
		n++;
		fclose(f1);
		return n;
	}

void m_getdata()		//UNTUK INPUTAN BARANG
	{
	fflush(stdin);
	oMain.code=getCurItemNo();
	gotoxy(25,7);
	printf("KODE=%d",oMain.code);
	//scanf("%d", &oMain.code);

	gotoxy(25,9);
	printf("ITEM=");

	fflush(stdin);
	//scanf("%25s",oMain.item);
	gets(oMain.item);

	gotoxy(25,11);
	printf("HARGA=");
	scanf("%d", &oMain.price);
	}

void m_showdataA(int ro)		//UNTUK LISTING KODE BARANG
	{
	gotoxy(20,ro);
	printf("%-3d  ", oMain.code);
	//gotoxy(25,ro);
	printf("%-15s  ", oMain.item);
	//gotoxy(42,ro);
	printf("%-6d", oMain.price);
	}

void m_showdataB()				//MENGEDIT HARGA BARANG
	{
	gotoxy(25,11);
	printf("KODE: %d", oMain.code);
	gotoxy(25,13);
	printf("ITEM: %s", oMain.item);
	gotoxy(25,15);
	printf("HARGA: %d", oMain.price);
	}

void BoxTitle()			//UNTUK MENAMPILKAN JUDUL
	{
	int i;
	int x1=25,y1=1,x2=55,y2=3;

	gotoxy(x1,y1);
	printf("%c", 218);		//