Programming Challenge #5

import java.util.Scanner;

public class fifthchallenge {

        public static void main(String[] args) {
                String star = "*";
                String output = "\n";
                String repeated = "";
                System.out.println("Input the number of revisions please");
                
                Scanner scan = new Scanner(System.in);
                
                int input = scan.nextInt();
                //System.out.println("The pattern will now evolve" + input + "times.");
                
                int looprepeater = 0;
                
                while (looprepeater <= input){
                        repeated = new String(new char[looprepeater]).replace("\0", star);
                        output = output + repeated + output;
                        looprepeater = looprepeater+1;
                }
                System.out.println(output);
                

        }

}

#include <iostream>

using namespace std;
int count = 1;
string fact(int num, string o="*"){
        if(count == num) return o;
        if(num <= 1){
                return o;
        }else{
                string ret;
                for(int i=0; i<count+1; i++){
                        ret += "*";
                }
                count++;
                return fact(num, o + "\n" + ret + "\n" + o);
        }
}

int main() {
        cout << fact(4);
        return 0;
}

import java.util.Scanner;

public class challenge5
{
        public static void main(String[] args)
        {
                Scanner scan = new Scanner(System.in);
                int num = scan.nextInt();
                if (num > 0)
                        System.out.println(getString(1, num));
        }

        public static String getString(int curr, int max)
        {
                if (curr == max)
                {
                        return "*\n";
                }

                String toAdd = "";
                for (int i = curr; i <= max; i++)
                {
                        toAdd += "*";
                }
                toAdd += "\n";
                String str = getString(curr + 1, max);
                return str + toAdd + str;
        }
}

#include <stdio.h>

int main(int argc, char* argv[]) { 
        int limit = 0;
        int j = 0;
        int k = 0;
        int l = 0;

        if(argc != 2){
                printf("Usage: asterisk {0-infinity}");
                exit(1);
        }
        else if(atoi(argv[1]) < 0){
                printf("Use a non-negative integer!");
                exit(1);
        }
        else{
                limit = atoi(argv[1]);
                
                if(limit != 0) printf("*\n");
                for(j=2; j<=limit; j++){
                        for(k=0; k<j; k++){
                                printf("*");
                        }
                        printf("\n");
                        printf("*\n");
                }
                
                for(l=limit-1; l>1; l--){
                        for(k=0; k<l; k++){
                                printf("*");
                        }
                        printf("\n");
                        printf("*\n");
                }
                
        }

        exit(0);
}

#include <stdio.h>

int half = 0;

void print(int line, int k){
        int j = 0;
        if(half == 1) printf("*\n");
        if(line >= half*2) return;   
        if(line != (half*2)-1) printf("*\n");
        for(j=0; j<k; j++) printf("*");
        printf("\n");
        if(line < half) return print(line+1, k+1);
        return print(line+1, k-1);
}

int main(int argc, char* argv[]) { 
        if(argc != 2){
                printf("Usage: asterisk {0-infinity}");
                exit(1);
        }
        else if(atoi(argv[1]) < 0){
                printf("Use a non-negative integer!");
                exit(1);
        }
        else{
                half = atoi(argv[1]);
                print(2, 2);
        }

        exit(0);
}

#include <iostream>
#include <string>
#include <vector>

using namespace std;

vector<string> printStars(int n);

int main(int argc, const char * argv[])
{
    // Number of stars in center line
    int number = 0;
    
    // User input
    cout << "Enter number: ";
    cin  >> number;
    
    // Vector to hold lines of output
    vector<string> output;
    
    // Call recursive function
    output = printStars(number);
    
    // Print output
    vector<string>::iterator i;
    for (i = output.begin(); i < output.end(); i++)
    {
        cout << *i << endl;
    }
    return 0;
}

vector<string> printStars(int n)
{
    vector<string> output;
    
    string currentLine;
    for (int i = 0; i < n; i++)
        currentLine.append("*");
    
    if (n > 1)
    {
        vector<string> mirrors = printStars(n-1);
        
        output.insert(output.begin(), mirrors.begin(), mirrors.end());
        output.insert(output.begin(), currentLine);
        output.insert(output.begin(), mirrors.begin(), mirrors.end());
    }
    else
    {
        output.insert(output.begin(), currentLine);
    }
    
    return output;
}