Chapter 12, Problem 50RQE

Header file used to perform file operations:

“fstream” (file stream) is the standard header file in C++ used to perform file operations such as file creation, write information to the file and read information from the file.

ofstream:

“ofstream” is a data type that represents output file stream used to create files and write information to files using output file stream object.

A file where the data are written is called as output file. When a program stores the output in a file, then it is called as output file.

ifstream:

“ifstream” is a data type that represents input file stream used to read information from files using input file stream object.

A file from which the data is read is called as input file. When a program gets input from the file, then it is called as input file.

Example program:

The below code is an example for the “fstream” usage to read information from file:

//Include the necessary header files

#include <iostream>

//Header file used to perform “file operations”

#include <fstream>

//Header file used to perform “string operations”

#include<string>

using namespace std;

//Main function

int main()

{

// String variable

string str= "sample...