Turbo C++ - Product Master File Creation (Menu Oriented)
I have given here the source code in Turbo C++ product master file creation with menu oriented in text mode.
Source Code
#include <conio.h>
#include <process.h>
#include <dos.h>
#include <iostream.h>
#include <stdio.h>
#include <string.h>
#pragma pack(2)
struct CProduct
{
public:
char name[128];
char category[128];
char manufacturer[128];
float price;
};
struct CProducts
{
#define MaxSz 100
char m_fileName[1024];
int m_nMaxProducts;
CProduct m_prodList[MaxSz];
CProducts(const char *filename);
void AddRecord(const char *name, const char *category, const char *manufacturer, float price);
void EditRecord(int pos, const char *name, const char *category, const char *manufacturer, float price);
void DeleteRecord(int pos);
int ReadRecords();
int WriteRecords();
};
CProducts::CProducts(const char *filename)
{
m_nMaxProducts = 0;
strcpy(m_fileName, filename);
}
void CProducts::AddRecord(const char *name, const char *category, const char *manufacturer, float price)
{
int pos = m_nMaxProducts;
strcpy(m_prodList[pos].name,name);
strcpy(m_prodList[pos].category,category);
strcpy(m_prodList[pos].manufacturer,manufacturer);
m_prodList[pos].price = price;
m_nMaxProducts++;
WriteRecords();
}
void CProducts::EditRecord(int pos, const char *name, const char *category, const char *manufacturer, float price)
{
strcpy(m_prodList[pos].name,name);
strcpy(m_prodList[pos].category,category);
strcpy(m_prodList[pos].manufacturer,manufacturer);
m_prodList[pos].price = price;
WriteRecords();
}
void CProducts::DeleteRecord(int pos)
{
m_nMaxProducts--;
for(int i = pos; i < m_nMaxProducts; i++)
{
m_prodList[i] = m_prodList[i + 1];
}
WriteRecords();
}
int CProducts::ReadRecords()
{
FILE *istream = fopen(m_fileName, "rb");
if (istream == 0)
return 0;
char buf[4096];
int nTotalRecordsRead = 0;
for(int i = 0; i < MaxSz; i++)
{
if(feof(istream))
break;
int nBytesRead = fread(buf, 1, sizeof(CProduct), istream);
if(nBytesRead < sizeof(CProduct))
break;
char *p = (char*)(&m_prodList[i]);
memcpy(p, buf, sizeof(CProduct));
nTotalRecordsRead++;
}
fclose(istream);
m_nMaxProducts = nTotalRecordsRead;
return nTotalRecordsRead;
}
int CProducts::WriteRecords()
{
FILE *ostream = fopen(m_fileName, "wb");
if (ostream == 0)
return 0;
int nTotalRecordsWritten = 0;
char buf[4096];
for(int i = 0; i < m_nMaxProducts; i++)
{
fwrite((char*)&m_prodList[i], 1, sizeof(CProduct), ostream);
nTotalRecordsWritten++;
}
fclose(ostream);
return nTotalRecordsWritten;
}
CProducts theProducts("c:\\products.bin");
int DisplayMainMenu()
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Product Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "1. Add Product";
gotoxy(10,7);
cout << "2. Edit Product";
gotoxy(10,8);
cout << "3. View Product";
gotoxy(10,9);
cout << "4. Delete Product";
gotoxy(10,10);
cout << "5. Exit";
gotoxy(10,11);
cout << "___________________________________________";
gotoxy(10,13);
cout << "Enter your Selection: ";
int m = -1;
cin >> m;
return m;
}
void ViewRecords()
{
theProducts.ReadRecords();
::system("cls");
gotoxy(10,4);
cout << "Welcome to Product Database Application";
gotoxy(10,5);
cout << "___________________________________________________________________";
gotoxy(10,6);
cout << "SNo Product Name Category Manufacturer Price ";
gotoxy(10,7);
cout << "___________________________________________________________________";
int pos = 8;
// Enable Paging
for(int i = 0; i < theProducts.m_nMaxProducts; i++)
{
gotoxy(10,pos);
cout << i + 1;
gotoxy(14,pos);
cout << theProducts.m_prodList[i].name;
gotoxy(33,pos);
cout << theProducts.m_prodList[i].category;
gotoxy(51,pos);
cout << theProducts.m_prodList[i].manufacturer;
gotoxy(72,pos);
cout << theProducts.m_prodList[i].price;
pos++;
}
gotoxy(10,pos++);
cout << "___________________________________________________________________";
pos++;
gotoxy(10,pos++);
}
void InputRecords()
{
while(1)
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Product Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "Product Name: ";
gotoxy(10,7);
cout << "Category Name: ";
gotoxy(10,8);
cout << "Manufacturer Name: ";
gotoxy(10,9);
cout << "Product Price: ";
gotoxy(10,10);
cout << "___________________________________________";
gotoxy(24,6);
char name[128];
cin >> name;
gotoxy(26,7);
char category[128];
cin >> category;
gotoxy(29,8);
char manufacturer[128];
cin >> manufacturer;
gotoxy(25,9);
float price;
cin >> price;
theProducts.AddRecord(name, category, manufacturer, price);
gotoxy(10,12);
cout << "Do you want to add another record (Y/N)? ";
char ch = getch();
if(ch == 'Y' || ch == 'y')
continue;
else
break;
}
}
void EditRecords()
{
ViewRecords();
cout << "Enter the serial number you want to edit: ";
int m;
cin >> m;
if(m >= 1 && m <= theProducts.m_nMaxProducts)
{
::system("cls");
gotoxy(10,4);
cout << "Welcome to Product Database Application";
gotoxy(10,5);
cout << "___________________________________________";
gotoxy(10,6);
cout << "Product Name: ";
gotoxy(10,7);
cout << "Category Name: ";
gotoxy(10,8);
cout << "Manufacturer Name: ";
gotoxy(10,9);
cout << "Product Price: ";
gotoxy(10,10);
cout << "___________________________________________";
gotoxy(24,6);
char name[128];
cin >> name;
gotoxy(26,7);
char category[128];
cin >> category;
gotoxy(29,8);
char manufacturer[128];
cin >> manufacturer;
gotoxy(25,9);
float price;
cin >> price;
theProducts.EditRecord(m - 1, name, category, manufacturer, price);
gotoxy(10,13);
cout << "Record updated. Press any key to return to Main Menu";
getch();
}
else
{
gotoxy(10,12);
cout << "Invalid Entry. Press any key to return to Main Menu";
getch();
}
}
void DeleteRecords()
{
ViewRecords();
cout << "Enter the serial number you want to delete: ";
int m;
cin >> m;
if(m >= 1 && m <= theProducts.m_nMaxProducts)
{
theProducts.DeleteRecord(m - 1);
cout << "Record deleted. Press any key to return to Main Menu";
getch();
}
else
{
cout << "Invalid Entry. Press any key to return to Main Menu";
getch();
}
}
int main()
{
theProducts.ReadRecords();
while(1)
{
int selection = DisplayMainMenu();
switch(selection)
{
case 1:
InputRecords();
break;
case 2:
EditRecords();
break;
case 3:
{
ViewRecords();
cout << "Press any key to return to Main Manu: ";
getch();
}
break;
case 4:
DeleteRecords();
break;
case 5:
default:
return 0;
};
}
}
Output
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