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C++ program to write and read text in/from file

In this program, we will create a file and then write some text into then file, after writing text file will be closed and again file will open in read mode, read all written text.

Write and read text in/from file

//C++ program to write and read text in/from file.
#include <iostream>
#include <fstream>
 
using namespace std;
 
int main()
{
   fstream file; //object of fstream class
    
   //opening file "sample.txt" in out(write) mode
   file.open("sample.txt",ios::out);
    
   if(!file)
   {
       cout<<"Error in creating file!!!"<<endl;
       return 0;
   }
    
   cout<<"File created successfully."<<endl;
   //write text into file
   file<<"ABCD.";
   //closing the file
   file.close();
    
   //again open file in read mode
   file.open("sample.txt",ios::in);
    
   if(!file)
   {
       cout<<"Error in opening file!!!"<<endl;
       return 0;
   }   
    
   //read untill end of file is not found.
   char ch; //to read single character
   cout<<"File content: ";
    
   while(!file.eof())
   {
       file>>ch; //read single character from file
       cout<<ch;
   }
    
   file.close(); //close file
    
   return 0;
}

Output

File created successfully.
File content: ABCD.

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