C++ program to count the number of lines in a file

#include<iostream>
#include<conio.h>
#include<fstream>

using namespace std;

int main()
{
    system("cls");

    int l=0;

    ofstream a("sample.txt",ios::out);

    a<<"If you think education is expensive then try ignorance"<<std::endl;
    a<<"Migh is Sight"<<std::endl;
    a<<"we are here to play"<<std::endl;
    a<<"now we are you";
    a.close();

    char str[150];

    ifstream b("sample.txt",ios::in);

    while(!b.eof())
    {
        l++;
        b.getline(str,150);
    }

    std::cout<<"The number of lines in flie = "<<l;

    getch();
    return 0;
}

The number of lines in file = 4