Programa C++ para imprimir el patrón de forma de diamante de pirámide de estrella hueca

Aquí, construiremos un programa en C++ para imprimir el patrón de forma de diamante de pirámide de estrella hueca que se puede lograr con dos enfoques, es decir

1. Uso   de bucle for
2. Usando el ciclo while

Aporte:

n = 5

Producción:

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1. Usando el bucle for

// C++ program to print hollow diamond pattern
#include <iostream>
using namespace std;
  
int main()
{
  
    int n = 5, rows, columns;
    // for loop is used to identify the number of rows and
    // it is used to print upper triangle
    for (rows = 1; rows <= n; rows++) {
        // used for printing the spaces
        for (columns = n; columns > rows; columns--) {
            cout << " ";
        }
        // print star
        cout << "*";
        // again print the spaces
        for (columns = 1; columns < (rows - 1) * 2;
             columns++) {
            cout << " ";
        }
        if (rows == 1) {
            cout << "\n";
        }
        else {
            cout << "*\n";
        }
    }
    // for loop is used to identify the number of rows and
    // it is used to print lower triangle
    for (rows = n - 1; rows >= 1; rows--) {
        // used for printing the spaces
        for (columns = n; columns > rows; columns--) {
            cout << " ";
        }
        // print star
        cout << "*";
        for (columns = 1; columns < (rows - 1) * 2;
             columns++) {
            cout << " ";
        }
        if (rows == 1) {
            cout << "\n";
        }
        else {
            cout << "*\n";
        }
    }
    return 0;
}

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2. Usando el bucle while:

// C++ program to print hollow diamond pattern
#include <iostream>
using namespace std;
  
int main()
{
  
    int n = 5, rows = 1, columns;
  
    // while loop is used to identify the number of rows and
    // it is used to print upper triangle
    while (rows <= n) {
        columns = n;
  
        // used for printing the spaces
        while (columns > rows) {
            cout << " ";
            columns--;
        }
        // print star
        cout << "*";
        columns = 1;
        while (columns < (rows - 1) * 2) {
            cout << " ";
            columns++;
        }
        if (rows == 1) {
            cout << "\n";
        }
        else {
            cout << "*\n";
        }
        rows++;
    }
    // while loop is used to identify the number of rows and
    // it is used to print lower triangle
    rows = n - 1;
    while (rows >= 1) {
        columns = n;
        // used for printing the spaces
        while (columns > rows) {
            cout << " ";
            columns--;
        }
        // print star
        cout << "*";
        columns = 1;
        while (columns < (rows - 1) * 2) {
            cout << " ";
            columns++;
        }
        if (rows == 1) {
            cout << "\n";
        }
        else {
            cout << "*\n";
        }
        rows--;
    }
    return 0;
}

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