C++ File Handling

[Core]

C++ File Handling


At first place I made this codes in this thread for one of pal who needs a help. then I thought this might be valuable for other people as well. if you need any help or want to know how to use file handling in C++ just go through the codes I made in here. I am sure then you can catch up the concept more easily.
remember this is included only small amount of streaming. still there are lot to learn.

http://www.elakiri.com/forum/showpost.php?p=10765261&postcount=11

#include <iostream>
#include <fstream>
#include <conio.h>

using namespace std;

struct items{
    int itemNo;
    char itemName[50];
    double itemPrice;
};


void read();
void write();
const char FileName[50] = "FileName.txt";
char symbol=0;

int main()
{    
        //write them into a file
    int whatToDo;
    cout << "if you want to write press 1 for reading 2" << endl;
    cin >> whatToDo;

    switch(whatToDo)
    {
        case 1:    //WRITE
write();
            break;
            
        case 2: //READ
read();
            break;
        default:
            break;    
    }

    
    cin.get();
    return 0;    
}


void write()
{
    struct items item;
    
            int itemNumber;
    char itemName[50];
    double itemPrice;
    
    
    while(1)
    {        
        cout << "What is the item no? " << endl;
        cin >> itemNumber;
        cin.ignore();
        
        cout << "What is the product name?" << endl;
        cin.getline(itemName,50,'\n');

        cout << "Whatis the price of the product" << endl;
        cin >> itemPrice;
        cin.ignore();
        
        item.itemNo=itemNumber;
        strcpy(item.itemName,itemName);
        item.itemPrice=itemPrice;
        
        //write to the file
        
                ofstream writeFile;
                writeFile.open(FileName,ios::out|ios::app|ios::binary);
                
                if(writeFile.fail())
                {
                    cerr << "An error occured..." << endl;
                }else
                {
                    
                        writeFile.write((char*)&item,sizeof item);
                
                    writeFile.clear();
                    writeFile.close();
                }    
above:
        cout << "Do you want to enter another record y/n" << endl;
  symbol=0;
        cin >> symbol;
        
        if(symbol == 'y')
        {
        //reloop    
        }else if(symbol== 'n')
        {
            break;
        }
        else
        {
            goto above;
        }
    }


    return;
}
    

void read()
{
    struct items item;
    
        ifstream readFile;
                readFile.open(FileName,ios::in|ios::binary);
                
                if(readFile.fail())
                {
                    cerr << "An error occured.." << endl;
                        
                }else
                {
                        while(readFile.read((char*)&item,sizeof item))
                        {
                            cout << "******************************************************" << endl;
                            cout << "the item number is " << endl;
                            cout << item.itemNo << endl;
                            
                            cout << "the item name is " << endl;
                            cout << item.itemName << endl;
                            
                            cout << "the item price is " << endl;
                            cout << item.itemPrice << endl;
                            cout << "******************************************************" << endl;
                        }

                }
                getch();
return;

}

Written by Core.!!!

 

[¤--bACarDi--¤]

write works with VC++ but got encoding errors i get some fucking jap letters lol
great work!

 

[Core]

write works with VC++ but got encoding errors i get some fucking jap letters lol
great work!

oh don't look at the textfile made by the .exe file. you have to go through the reading process to retrieve the data.anyway I've tested this on MinGW.