File Handling Program
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This C++ program defines an inventory class with data members to store item name, quantity, price, and total amount. It uses file handling operations to write inventory objects to a text file and read from the file to display the stored data. The main function contains a menu to allow the user to choose between writing data to the file, reading from the file to display the stored items, or exiting the program.
![oop_1
#include <iostream>
#include <fstream>
using namespace std;
class inventory
{
char name[20];
int qty;
double price,total;
public:
void getdata()
{
cout<<"enter Name "; cin>>name;
cout<<"Enter Qty ";cin>>qty;
cout<<"Enter price ";cin>>price;
total=qty*price;
}
void putdata()
{
cout.setf(ios::left,ios::adjustfield);
cout.width(15);
cout<<name;
cout.width(10);
cout<<price;
cout.width(10);
cout<<qty;
cout.width(10);
cout<<total;
cout<<endl;
}
};
int main()
{
int i=0;int ch;
fstream inout;
inventory item[5];
//inout.open("stock.txt",ios::in|ios::out);
do
{
cout<<"File Handling with Class"<<endl;
cout<<"Menu for File Operation"<<endl;
cout<<"1. Write Data into File"<<endl;
cout<<"2. Read Data From File"<<endl;
cout<<"3. Exit "<<endl;
cout<<"Enter your Choice "; cin>>ch;
switch(ch)
Page 1](https://image.slidesharecdn.com/oop1-140421065114-phpapp01/85/File-Handling-Program-1-320.jpg)
![oop_1
{
case 1:
{
inout.open("stock.txt",ios::in|ios::out|ios::ate);
//cout<<tellp();
item[i].getdata();
inout.write((char *)& item[i], sizeof(item[i]));
i++;
inout.clear();
inout.close();
break;
}
case 2:
{
inout.open("stock.txt",ios::in);
inout.seekg(0,ios::beg);
cout.setf(ios::left,ios::adjustfield);
cout.width(15);cout<<"Item Name";
cout.width(10);cout<<"Price";cout.width(10);cout<<"Qty";cout.width(15);cout<<"Total
Amt"<<endl;
cout.width(55);
cout.fill('-');
cout<<"-"<<endl;
cout.fill(' ');
for(int j=0;j<=i;j++)
{
while(inout.read((char *)& item[i],sizeof(item[i])))
{
item[i].putdata();
}
}
inout.close();
break;
}
case 3:
{
return 0;
}
default:
{
cout<<"Enter valid choice "<<endl;
break;
}
}
}while(true);
return 0;
Page 2](https://image.slidesharecdn.com/oop1-140421065114-phpapp01/85/File-Handling-Program-2-320.jpg)
File Handling Program
- 1. oop_1 #include <iostream> #include <fstream> using namespace std; class inventory { char name[20]; int qty; double price,total; public: void getdata() { cout<<"enter Name "; cin>>name; cout<<"Enter Qty ";cin>>qty; cout<<"Enter price ";cin>>price; total=qty*price; } void putdata() { cout.setf(ios::left,ios::adjustfield); cout.width(15); cout<<name; cout.width(10); cout<<price; cout.width(10); cout<<qty; cout.width(10); cout<<total; cout<<endl; } }; int main() { int i=0;int ch; fstream inout; inventory item[5]; //inout.open("stock.txt",ios::in|ios::out); do { cout<<"File Handling with Class"<<endl; cout<<"Menu for File Operation"<<endl; cout<<"1. Write Data into File"<<endl; cout<<"2. Read Data From File"<<endl; cout<<"3. Exit "<<endl; cout<<"Enter your Choice "; cin>>ch; switch(ch) Page 1
- 2. oop_1 { case 1: { inout.open("stock.txt",ios::in|ios::out|ios::ate); //cout<<tellp(); item[i].getdata(); inout.write((char *)& item[i], sizeof(item[i])); i++; inout.clear(); inout.close(); break; } case 2: { inout.open("stock.txt",ios::in); inout.seekg(0,ios::beg); cout.setf(ios::left,ios::adjustfield); cout.width(15);cout<<"Item Name"; cout.width(10);cout<<"Price";cout.width(10);cout<<"Qty";cout.width(15);cout<<"Total Amt"<<endl; cout.width(55); cout.fill('-'); cout<<"-"<<endl; cout.fill(' '); for(int j=0;j<=i;j++) { while(inout.read((char *)& item[i],sizeof(item[i]))) { item[i].putdata(); } } inout.close(); break; } case 3: { return 0; } default: { cout<<"Enter valid choice "<<endl; break; } } }while(true); return 0; Page 2