CPP File & Stream

CPP standard library fstream is used to create a file, to read the data from a file and to write the data into a file in CPP programming. There are three data types defined in fstream library. These are:

fstream:

Used to create a file, to read the data from a file and to write the data into a CPP file.

ifstream:

Used to read the data from a CPP file.

ofstream:

Used to create a file and to write the data into a CPP file.

Example:

#include <iostream>  
#include <fstream>  
using namespace std;  
 
int main ()
{  
char arr[100];  
ofstream str;  
str.open("myfile.txt");  
cout <<"Saving your informations." << endl;  
cout << "Dress Required: ";   
cin.getline(arr, 100);  
str << arr << endl;  
cout << "Dress Color Required: ";   
cin >> arr;  
cin.ignore();  
str << arr << endl;  
str.close();  
cout << "\n";
ifstream str2;   
string line;  
str2.open("myfile.txt");   
cout << "Review the Saved informations." << endl;   
while (getline (str2,line))  
{  
cout << line << endl;  
} 	 
str.close();  
return 0;  
}

Output

Saving your informations
Dress Required: T Shirt             
Dress Color Required: White                                      
 
Review the Saved informations.          
T Shirt                
White

CPP examples programs