Example: Left Arrow Pattern and Right Arrow Pattern in C++

// Left Arrow Pattern and Right Arrow Pattern in C++
#include <iostream>
using namespace std;

int leftRightArrowsPattern(int rows);

// It's the driver function
int main() {
    int rows;

    cout << "-----Enter the number of rows to print the left & right arrows pattern-----\n";
    cin >> rows;

    if (rows > 0) {
        // calling function to print the pattern
        leftRightArrowsPattern(rows);
    }
    return 0;
}

// This function will print left arrow pattern & right arrow pattern
int leftRightArrowsPattern(int rows) {
    int r, r1, c, row1;

    row1 = rows;
    rows = rows * 4;

    cout << "\n----Ths is the left arrow pattern-----\n\n";
    for (r = 1; r < rows; r++) {
        // to print the left arrow
        if (r <= row1) {
            for (c = 1; c <= (row1 - r); c++)
                cout << " ";
            for (c = r;c <= row1; c++)
                cout << "*";
            cout << "\n";
        }
        if (r > row1 && r <= row1 * 2) {
            for (c = 1; c <= (r - row1); c++)
                cout << " ";
            for (c = 1; c <= (r - (row1 - 1)); c++) {
                if ((r - row1) < row1)
                    cout << "*";
            }
            cout << "\n";
        }

        // to print the right arrow
        if (r > row1 * 2 && r <= row1 * 3) {
            if (r == (row1 * 2) + 1)
                cout << "\n----Ths is the right arrow pattern-----\n\n";
            for (c = (r - 1) - (row1 * 2); c >= 1; c--)
                cout << "  ";
            for (c = (3 * row1) - (r - 1); c >= 1; c--)
                cout << "*";
            cout << "\n";
        }
        if (r > row1 * 3) {
            for (c = (row1 * 4) - (r + 1); c >= 1; c--)
                cout << "  ";
            for (c = (r + 1) - (3 * row1); c >= 1; c--)
                cout << "*";
            cout << "\n";
        }
    }
}