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<blockquote data-quote="Core" data-source="post: 10765340" data-attributes="member: 263471">C++ File HandlingAt 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. <a href="http://www.elakiri.com/forum/showpost.php?p=10765261&amp;postcount=11" target="_blank">http://www.elakiri.com/forum/showpost.php?p=10765261&amp;postcount=11</a>[CODE]#include &lt;iostream&gt;#include &lt;fstream&gt;#include &lt;conio.h&gt;using namespace std;struct items{&nbsp; &nbsp; int itemNo;&nbsp; &nbsp; char itemName[50];&nbsp; &nbsp; double itemPrice;};void read();void write();const char FileName[50] = &quot;FileName.txt&quot;;char symbol=0;int main(){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //write them into a file&nbsp; &nbsp; int whatToDo;&nbsp; &nbsp; cout &lt;&lt; &quot;if you want to write press 1 for reading 2&quot; &lt;&lt; endl;&nbsp; &nbsp; cin &gt;&gt; whatToDo;&nbsp; &nbsp; switch(whatToDo)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; case 1:&nbsp; &nbsp; //WRITEwrite();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; case 2: //READread();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; default:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; cin.get();&nbsp; &nbsp; return 0;&nbsp; &nbsp; }void write(){&nbsp; &nbsp; struct items item;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; int itemNumber;&nbsp; &nbsp; char itemName[50];&nbsp; &nbsp; double itemPrice;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; while(1)&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;What is the item no? &quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; cin &gt;&gt; itemNumber;&nbsp; &nbsp; &nbsp; &nbsp; cin.ignore();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;What is the product name?&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; cin.getline(itemName,50,'\n');&nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;Whatis the price of the product&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; cin &gt;&gt; itemPrice;&nbsp; &nbsp; &nbsp; &nbsp; cin.ignore();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; item.itemNo=itemNumber;&nbsp; &nbsp; &nbsp; &nbsp; strcpy(item.itemName,itemName);&nbsp; &nbsp; &nbsp; &nbsp; item.itemPrice=itemPrice;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //write to the file&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ofstream writeFile;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; writeFile.open(FileName,ios::out|ios::app|ios::binary);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(writeFile.fail())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cerr &lt;&lt; &quot;An error occured...&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; writeFile.write((char*)&amp;item,sizeof item);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; writeFile.clear();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; writeFile.close();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; above:&nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;Do you want to enter another record y/n&quot; &lt;&lt; endl;&nbsp; symbol=0;&nbsp; &nbsp; &nbsp; &nbsp; cin &gt;&gt; symbol;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(symbol == 'y')&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; //reloop&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else if(symbol== 'n')&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; else&nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; goto above;&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; return;}&nbsp; &nbsp; void read(){&nbsp; &nbsp; struct items item;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ifstream readFile;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; readFile.open(FileName,ios::in|ios::binary);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(readFile.fail())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cerr &lt;&lt; &quot;An error occured..&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; while(readFile.read((char*)&amp;item,sizeof item))&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;******************************************************&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;the item number is &quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; item.itemNo &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;the item name is &quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; item.itemName &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;the item price is &quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; item.itemPrice &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; &quot;******************************************************&quot; &lt;&lt; endl;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; getch();return;}[/CODE]Written by Core.!!!</blockquote>

[QUOTE="Core, post: 10765340, member: 263471"] [B][SIZE=4]C++ File Handling[/SIZE] [/B] [B] 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. [/B] [URL]http://www.elakiri.com/forum/showpost.php?p=10765261&postcount=11[/URL] [CODE]#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; }[/CODE] [SIZE=4][COLOR=Black][B]Written by Core.!!![/B][/COLOR][/SIZE] [/QUOTE]

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