Question

Using C++ language and a file attached full of words lines

np pointers

basic code please

how can i write a function that grabs randomly(number input by the user) lines from the file and print them using..... while (getline(name of the file, strng){

Answer 1

If you have any doubts, please give me comment...

#include<iostream>

#include<string>

#include<fstream>

using namespace std;

void printNLines(ifstream &in, int n);

int main(){

    ifstream in;

    int n;

    in.open("input.txt");

    if(in.fail()){

        cout<<"Unable to open input.txt"<<endl;

        return -1;

    }

    cout<<"Enter number of lines you need: ";

    cin>>n;

    printNLines(in, n);

    in.close();

    return 0;

}

void printNLines(ifstream &in, int n){

    string line;

    int line_no=0;

    while(getline(in, line) && line_no<n){

        cout<<"Line "<<line_no<<": "<<line<<endl;

        line_no++;

    }

}