C++ Exercises: Create a checkerboard pattern with the words "black" and "white"

Last update on April 07 2025 12:59:21 (UTC/GMT +8 hours)

66. Checkerboard Pattern with "black" and "white"

Write code to create a checkerboard pattern with the words "black" and "white".

Visual Presentation:

Sample Solution:-

C++ Code :

#include <iostream> // Include input/output stream library
using namespace std; // Use the standard namespace

int main() // Main function where the execution of the program starts
{
    int i, j, rows; // Declare variables for iteration and rows
    string b, w, t; // Declare string variables b, w, and t for black, white, and temporary value storage

    b = "black"; // Assign the string "black" to variable b
    w = "white"; // Assign the string "white" to variable w

    cout << "\n\n Display checkerboard pattern with the words 'black' and 'white':\n"; // Display description
    cout << "---------------------------------------------------------------------\n";
    cout << " Input number of rows: "; // Prompt user to input number of rows
    cin >> rows; // Read the input number of rows from the user

    // Loop to create a checkerboard pattern of words 'black' and 'white'
    for (i = 1; i <= rows; i++) 
    {
        // Loop to generate each row of the checkerboard pattern
        for (j = 1; j <= rows; j++) 
        {
            // Condition to alternate between 'black' and 'white' based on column position
            if (j % 2 != 0) 
            {
                cout << b; // Display 'black'
                if (j < rows) 
                {
                    cout << "-"; // Display '-' to separate words
                }
            }
            else if (j % 2 == 0) 
            {
                cout << w; // Display 'white'
                if (j < rows) 
                {
                    cout << "-"; // Display '-' to separate words
                }
            }
        }

        // Swap the values of b and w to change the sequence of words for the next row
        t = b;
        b = w;
        w = t;

        cout << endl; // Move to the next line after completing each row
    }
}

Sample Output:

 Display checkerboard pattern with the words 'black' and 'white':      
---------------------------------------------------------------------  
 Input number of rows: 5                                               
black-white-black-white-black                                          
white-black-white-black-white                                          
black-white-black-white-black                                          
white-black-white-black-white                                          
black-white-black-white-black

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to generate a checkerboard pattern by alternating the words "black" and "white" for a given number of rows.
• Write a C++ program that prints a checkerboard layout using "black" and "white" separated by hyphens, with dynamic row input.
• Write a C++ program to display a pattern of "black" and "white" in alternating order, ensuring each row starts with the opposite word of the previous row.
• Write a C++ program that reads a number of rows and prints a checkerboard of words "black" and "white" with proper spacing.

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