How to count number of lines in text file in C++ - cppexamples

Questions:

How to count number of lines in text file in C++

Explanation:

In this program you will learn how to count number of line in a text file.


Code:

#include<iostream>

#include<fstream>

#include<string>

using namespace std;

void main() {

       fstream file;//creating txt file

       file.open("Reading.txt",ios::in); //opening file in reading mod Reading.txt file is located in your project folder

       int temp2 = 0; //counter

       cout << "Data In Reading File" << endl;

       while (file) {

              string temp;

              getline(file, temp);

              cout << temp << endl;

              temp2++;

       }

       cout << "Number of Lines == " << temp2<<endl;

}

Output:

Reading.txt

Code Output

Related Articles:

C Plus Plus Program to Create a File & Store Information

C Plus Plus Program to Illustrate Reading of Data from a File

Read More

Recursive C Plus Plus program to linearly search an element in a given array

Questions:

Recursive C Plus Plus program to linearly search an element in a given array

Code:

#include<iostream>

using namespace std;

/* Recursive function to search x in arr[l..r] */

int recSearch(int arr[], int l, int r, int x)

{

       if (r < l)

              return -1;

       if (arr[l] == x)

              return l;

       return recSearch(arr, l+1, r, x);

}

int main()

{

       int arr[] = {12, 34, 54, 2, 3}, i;

       int n = sizeof(arr)/sizeof(arr[0]);

       int x = 3;

       int index = recSearch(arr, 0, n-1, x);

       if (index != -1)

              cout<<"Element "<<x<<" is present at index "<<index<<endl;

       else

              cout<<"Element"<<x<<" is not present"<<endl;

       return 0;

}

Output

Read More

C Plus Plus function to find maximum in arr[] of size n

Questions:

C Plus Plus function to find maximum in arr[] of size n

Code:

// C Plus Plus function to find maximum in arr[] of size n

#include<iostream>

using namespace std;

int largest(int arr[], int n)

{

    int i;

   

    // Initialize maximum element

    int max = arr[0];

    // Traverse array elements from second and

    // compare every element with current max 

    for (i = 1; i < n; i++)

        if (arr[i] > max)

            max = arr[i];

    return max;

}

int main()

{

    int arr[] = {10, 324, 45, 90, 9808};

    int n = sizeof(arr)/sizeof(arr[0]);

    cout<<"Largest in given array is "<< largest(arr, n)<<endl;

    return 0;

}

Output

Read More

C plus plus Program to find sum of elements in a given array

Questions:

C plus plus Program to find sum of elements in a given array

Code:

/* C plus plus Program to find sum of elements in a given array  */

#include<iostream>

using namespace std;

#define MAX_SIZE 100

// C plus plus program to return sum of elements in an array of size n

int sum(int arr[], int n)

{

    int sum = 0; // initialize sum

    int i;

    // Iterate through all elements and add them to sum

    for (i = 0; i < n; i++)

       sum +=  arr[i];

    return sum;

}

int main()

{

    int arr[MAX_SIZE];

    int n, i;

    cout<<"Eneter the number of elements in array\n";

    cin>>n;

    cout<<"Enter Elements \n";

    for (i = 0; i < n; i++)

    cin>>arr[i];

    cout<<"Sum of the elements is "<<sum(arr, n);

    return 0;

}

Output

Read More