Read integers from a text file with C++ ifstream

Here is an example of Read integers from a text file with C++ ifstream.

Example

#include <fstream>
#include<iostream>
using namespace std;
int main() {
   //initialie the array size
   int arr[30];
   ifstream is("a.txt");
   int cnt= 0;
   int x;
   // check that array is not already full
   while (cnt < arr[30] && is >> x)
   // and read integer from file
   arr[cnt++] = x;
   // print the integers stored in the array
   cout<<"The integers are:"<<"\n";
   for (int i = 0; i < cnt; i++) {
      cout << arr[i] <<' ';
   }
   //close the file
   is.close();
}

Output

The integers are:
1 2 3 4 5 6 7

Smita Kapse

Published on 18-Jun-2019 08:30:20

• Related Questions & Answers
• Read Data from a Text File using C++
• How to read a text file with C++?
• How to read integers from a file using BufferedReader in Java?
• How to read a text file from resources in Kotlin?
• How to read a text file in Selenium with python?
• Read integers from console in Java
• How to read a text file in Python?
• How to read an entire line from a text file using Python?
• How to read a number of characters from a text file using Python?
• Read in a file in C# with StreamReader
• How to read text file into a list or array with Python?
• How to read a simple text file in Android App?
• Read/Write Class Objects from/to File in C++
• Write a C program to read a data from file and display
• How to read data from a file using FileInputStream?