C++ Half Pyramid Pattern Using Star Program

Introduction

In this lab, you will learn how to create a half pyramid pattern using stars (*) by using the C++ programming language. This lab will teach you how to implement various nested loop structures using iteration.

Skills Graph

Create a new file in the ~/project directory

First, create a new file called half_pyramid_star.cpp in the ~/project directory using the touch command in the terminal:

touch ~/project/half_pyramid_star.cpp

Enter the code

Now, open the half_pyramid_star.cpp file in a text editor or IDE, and copy the following code into it:

#include <iostream>
using namespace std;

int main()
{
    cout << "\n\nWelcome to Studytonight :-)\n\n\n";
    cout << "===== Program to print a Half Pyramid using * =====\n\n\n";

    int i, j, rows;
    cout << "Enter the number of rows in the pyramid: ";
    cin >> rows;

    //outer loop moves to a specific row
    for (i = 1; i <= rows; i++)
    {
        //inner loop determines the amount of "*" printed in the row
        for (j = 1; j <= i; j++)
        {
            cout << "* ";
        }

        cout << endl;
    }

    cout << "\n\n";
    return 0;
}

The code above prompts the user to enter the number of rows to print the half pyramid pattern and uses two nested loops to print "*" on each line.

Compile and run the code

Enter the following command in the terminal window to compile the half_pyramid_star.cpp code:

g++ ~/project/half_pyramid_star.cpp -o ~/project/half_pyramid_star && ~/project/half_pyramid_star

The above command will compile the code, create an executable file called half_pyramid_star, and run the program.

Summary

In this lab, you learned how to create a half pyramid pattern using stars (*) in C++ programming language. By utilizing nested loops and understanding their scope, you were able to complete the lab successfully. This lab is a fundamental step in building an understanding of nested loop structures and iteration, which will be helpful in solving problems or creating complex shapes.