-->




write data into a text file c++ program

4 comments
Write a C++ program in which user will continuously enter data into a text file and program should terminate when user press ESC key. Keep the program as simple as you can use any c++ compiler CodeBlocks is recommended.
Concept used
File pointer  FILE * represents pointer to a variable of FILE type

function fopen() is used to open a file and takes two parameters.
  1. Name of a file with its extension in double quotes it can include file path or not
    for example "NewFile.txt"  or  "c://NewFile.txt" if path is not specified it will open a
    file in current directory where your .c or .cpp file is.
  2. File opening mode it represent the purpose of opening of file and what operation will be perform on the file reading, writing, or editing. In this example file mode will be "w" for
    writing
fopen prototype FILE *fopen(const chr *fileName,  const char *mode );

Program explanation

  • A while loop is used and will terminate when user will press esc key. To get the characters a function getche() is used from conio.h which will store in char variable and store into the file using putc() function. 
  • On pressing esc to avoid any other character written into the file an if condition is used which will write space into the file when user will press escape.
C++ source code

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

using namespace std;

int main()
{
    FILE *fp;
    char ch;
    fp = fopen("text.txt","w");
    cout<<"Type characters to write into file"<<endl;
    cout<<"Press Esc to close file\n\n\n"<<endl;

    while(ch!=27) {

      ch=getche();

      if(ch==27) {
         putc(' ',fp);
      } else {
         putc(ch,fp);
      }


      if(ch==13) {
         cout<<"\n";
         putc('\n',fp);

      }

    }// end of while loop

    fclose(fp);
    cout<<"\n\n\n";
    return 0;
}


Input Output of program
c++ program to write data into a text file


Recommended: For good learning do experiment with code and examine the output

4 comments:

  1. Dude, this is the C API, not C++.... The only C++ you used is cout. Why use ASCII values instead of character constants?

    ReplyDelete
  2. Dude, this is the C API, not C++.... The only C++ you used is cout. Why use ASCII values instead of character constants?

    ReplyDelete
  3. Thanks for posting the article it is very help us for me..

    ReplyDelete
  4. C and C++ classes in Delhi NCR- RKM IT Institute provides high quality C and C++ classes in Delhi, C and C++ training in Delhi NCR, C and C++ live project training in Delhi NCR at affordable price. To get details information about free and timing visit our website Edutech.rkmsolution.com.

    ReplyDelete